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mondofacto - Online Medical Dictionary Category: Health and Medicine > Medical Dictionary Date & country: 26/01/2008, UK Words: 116197

placenta triplex
Synonym for placenta tripartita ... A placenta consisting of three parts almost entirely separate, being joined together only by the blood vessels of the umbilical cord; the foetus is single. ... Synonym: placenta triloba, placenta triplex. ... (05 Mar 2000) ...

placenta uterina
Synonym for pars uterina placentae ... <anatomy> The part of the placenta derived from the uterine tissue. ... See: placenta. ... Synonym: maternal placenta, placenta uterina. ... (05 Mar 2000) ...

placenta velamentosa
A placenta in which the umbilical cord is attached to the adjoining membranes, with the umbilical vessels spread out and entering the placenta independently. ... (05 Mar 2000) ...

placenta, accessory
An extra placenta separate from the main placenta. Also called a succenturiate or supernumerary placenta. Placenta accreta: the abnormal adherence of the chorionic villi to the myometrium. The vascular processes of the chorion (a foetal membrane that enters into the formation of the placenta) grow directly in the myometrium (the muscular portion of …

placenta, low
Location of the placenta in the lower part of the uterus (womb) so that the placenta partially or completely covers the cervix. Also known as a placenta previa. ... (12 Dec 1998) ...

placenta, retained
A placenta which is either adherent or incarcerated by irregular uterine contractions, and which in consequence fails to be expelled after birth. ... (12 Dec 1998) ...

placenta, succenturiate
An extra placenta separate from the main placenta. In anatomy succenturiate means accessory to an organ. In this case, a succenturiate placenta is an accessory placenta. ... (12 Dec 1998) ...

placenta, supernumerary
A succenturiate or accessory placenta. ... (12 Dec 1998) ...

placental abruption
<obstetrics> An third trimester complication that results from the haemorrhage and accumulation of blood between the placenta and the wall of the uterus. ... This inevitably interferes with foetal oxygenation and often necessitates the need for emergency cesarean section delivery. ... (31 Dec 1997) ...

placental barrier
Synonym for placental membrane ... The semipermeable layer of foetal tissue separating the maternal from the foetal blood in the placenta; composed of: 1) endothelium of the foetal vessels in the chorionic villi, 2) stromata of the villi, 3) cytotrophoblast (negligible after the fifth month of gestation), and 4) syncytial trophoblast covering the vi …

placental calcium-binding protein
<protein> Calcium binding protein of placenta, uterus and vasculature containing the EF hand motif. ... (18 Nov 1997) ...

placental chorioangioma
<radiology> Most common benign tumour of placenta, incidence: 0.7%, Differential diagnosis: hydatidaform mole, large leiomyoma, chorioepithelioma, complications: IUGR, foetal anomaly, polyhydramnios, haemorrhage, heart failure, premature labour ... (12 Dec 1998) ...

placental circulation
The circulation of blood through the placenta during intrauterine life, serving the needs of the foetus for aeration, absorption, and excretion; also, maternal circulation through the intervillous space of the placenta. ... (05 Mar 2000) ...

placental dysfunction
Synonym for dysmature ... 1. Denoting faulty development or ripening; often connoting structural and/or functional abnormalities. ... 2. In obstetrics, denoting an infant whose birth weight is inappropriately low for its gestational age. ... 3. Immature development of the placenta so that normal function does not occur. ... Synonym: placental dysfuncti …

placental dysfunction syndrome
<syndrome> Foetal malnutrition and hypoxia resulting from impaired transfer of oxygen and various nutritive materials from mother to foetus. ... (05 Mar 2000) ...

placental dysmature
Immature development of the placenta so that normal function does not occur. ... (05 Mar 2000) ...

placental dystocia
Trouble delivering the placenta (the afterbirth). Dystocia comes from the greek dys meaning difficult, painful, disordered, abnormal + tokos meaning birth. ... (12 Dec 1998) ...

placental extracts
Extracts prepared from placental tissue; they may contain specific but uncharacterised factors or proteins with specific activities. ... (12 Dec 1998) ...

placental function tests
Methods used for the assessment of placental function. ... (12 Dec 1998) ...

placental growth hormone
human placental lactogen ...

placental hormones
Hormones produced by the placenta during pregnancy, including chorionic gonadotropin and substances having oestrogen, progestin, or adrenocorticoid activity. ... (12 Dec 1998) ...

placental insufficiency
Failure of the placenta to deliver an adequate supply of nutrients and oxygen to the foetus. ... (12 Dec 1998) ...

placental lactogen
<chemical> A polypeptide hormone secreted by the placenta that enters the maternal circulation and disappears from the circulation immediately after delivery. It has growth-promoting activity, is immunologically similar to human growth hormone, and inhibits maternal insulin activity during pregnancy. By inhibiting glucose oxidation it can inc …

placental lobes
Cotyledons of the human placenta, viewed on the maternal surface as irregularly shaped elevations or lobe's. ... (05 Mar 2000) ...

placental membrane
The semipermeable layer of foetal tissue separating the maternal from the foetal blood in the placenta; composed of: 1) endothelium of the foetal vessels in the chorionic villi, 2) stromata of the villi, 3) cytotrophoblast (negligible after the fifth month of gestation), and 4) syncytial trophoblast covering the villi; the placental membrane acts a …

placental parasitic twin
Synonym for omphalosite ... Underdeveloped twin of allantoidangiopagous twin; joined by umbilical vessels. ... Synonym: placental parasitic twin. ... Origin: omphalo-+ G. Sitos, food ... (05 Mar 2000) ...

placental plasmodium
Synonym for syncytiotrophoblast ... The syncytial outer layer of the trophoblast; site of synthesis of human chorionic gonadotropin. ... See: trophoblast. ... Synonym: placental plasmodium, plasmodial trophoblast, plasmodiotrophoblast, syncytial trophoblast, syntrophoblast. ... Origin: syncytium + trophoblast ... (05 Mar 2000) ...

placental polyp
A polyp developed from a piece of retained placenta. ... (05 Mar 2000) ...

placental presentation
Synonym for placenta previa ... <obstetrics> The anatomic positioning of the placenta over the cervical os (opening to the birth canal). This is an important cause of painless third trimester bleeding in the pregnant female. Many cases of placenta previa will require cesarean section delivery. ... (31 Dec 1997) ...

placental septa
Incomplete partitions between placental cotyledons; they are covered with trophoblast and contain a core of maternal tissue. ... (05 Mar 2000) ...

placental sign
<clinical sign> Slight endometrial oozing of blood which occurs in certain animals and sometimes in women at the time of implantation of the fertilised ovum; in women, if the blood appears externally it may be mistaken for a scanty menstrual period. ... (05 Mar 2000) ...

placental site trophoblastic tumour
A tumour usually arising in the uterus of parous women during reproductive years. Histologically, the tumour consists of a predominance of intermediate trophoblastic cells with fibrinoid material and vascular invasion. ... (05 Mar 2000) ...

placental souffle
Synonym for uterine souffle ... A blowing sound, synchronous with the cardiac systole of the mother, heard on auscultation of the pregnant uterus. ... Synonym: placental souffle. ... (05 Mar 2000) ...

placental stage of labour
The part of labour from the birth of the baby until the placenta (afterbirth) and foetal membranes are delivered. Also called the third stage of labour. ... (12 Dec 1998) ...

placental sulfatase deficiency
<enzyme> An enzyme defect in the placenta which results in failure of conversion of 16a-hydroxydehydroepiandrosterone to estriol; women with this condition rarely enter into spontaneous labour. ... (05 Mar 2000) ...

placental thrombosis
Thrombosis of the veins of the uterus at the placental site. ... (05 Mar 2000) ...

placental transfusion
Return to the newborn via the umbilical vessels some of the foetal placental blood. ... (05 Mar 2000) ...

placentascan
An obsolete method of determining the location of the placenta by means of injected radioactive material and its localization and display by a scintillation detector. ... (05 Mar 2000) ...

placentation
<zoology> In mammals, the process of a placenta forming during gestation. ... <plant biology> In plants, the arrangement of placentas, and hence of ovules, within an ovary. ... (31 Dec 1997) ...

placentitis
Inflammation of the placenta. ... (05 Mar 2000) ...

placentography
An obsolete term for radiography of the placenta following intrauterine injection of a radiopaque contrast medium. ... Origin: placenta + G. Grapho, to write ... (05 Mar 2000) ...

placentotherapy
Therapeutic use of an extract of placental tissue. ... (05 Mar 2000) ...

Placido da Costa, Antonio
<person> Portuguese ophthalmologist, 1848-1916. ... See: Placido da Costa's disk. ... (05 Mar 2000) ...

Placido da Costa's disk
Synonym for keratoscope ... <instrument> An instrument marked with lines or circles by means of which the corneal reflex can be observed. ... Synonym: Placido da Costa's disk. ... Origin: kerato-+ G. Skopeo, to examine ... (05 Mar 2000) ...

placode
<embryology> Area of thickened ectoderm in the embryo from which a nerve ganglion or a sense organ will develop. ... (31 Dec 1997) ...

pladaroma
Pladarosis ... A soft wartlike growth on the eyelid. ... Origin: G. Pladaros, wet, damp, flaccid, + -oma, tumour ... (05 Mar 2000) ...

plafond
A ceiling, especially the ceiling of the ankle joint, i.e., the articular surface of the distal end of the tibia. ... Origin: Fr. Ceiling ... (05 Mar 2000) ...

plagiarism
Passing off as one's own the work of another without credit. ... (12 Dec 1998) ...

plagio-
Oblique, slanting. ... Origin: G. Plagios ... (05 Mar 2000) ...

plague
1. To infest or afflict with disease, calamity, or natural evil of any kind. 'Thus were they plagued And worn with famine.' (Milton) ... 2. To vex; to tease; to harass. 'She will plague the man that loves her most.' (Spenser) ... Synonym: To vex, torment, distress, afflict, harass, annoy, tease, tantalize, trouble, molest, embarrass, perplex. ... Orig …

plague bacillus
Synonym for yersinia pestis ... The bacterial cause of the bubonic plague which in the year 541 (as the black death) and later in the middle ages decimated europe. The effects of the plague are described in the nursery rhyme we all fall down. It is transmitted to humans by the bite of fleas that have fed on infected animals, mostly rodents. Plague o …

plague pneumonia
Synonym for pneumonic plague ... A rapidly progressive and frequently fatal form of plague in which there are areas of pulmonary consolidation, with chill, pain in the side, bloody expectoration, and high fever. ... Synonym: plague pneumonia, pulmonic plague. ... (05 Mar 2000) ...

plague septicaemia
Infection with the plague organism, Yersinia pestis, with blood-stream infection. ... (05 Mar 2000) ...

plague vaccine
A suspension of killed yersinia pestis used for immunizing people in enzootic plague areas. ... (12 Dec 1998) ...

plague, black
In the 14th century the victims of the black plague had bleeding below the skin (subcutaneous haemorrhage) which made darkened ( blackened ) their bodies. ... (12 Dec 1998) ...

plague, bubonic
The most common form of the plague named for the characteristic buboes which are enlarged lymph nodes ( swollen glands ) in the groin that aretender and painful. Lymph nodes may be similarly affected in the armpits (axillae), neck and elsewhere. Other features of the bubonic plague include headache, fever, chills, and weakness. The odd word bubo co …

plague, great
The Great Plague that swept London in 1665 was probably not really the plague but rather typhus. ... (12 Dec 1998) ...

plague, sylvatic
Plague that is spread by ground squirrels and other wild rodents, for example, in the western portion of the united states. Sylvatic has to do with sylvan, the woods. ... (12 Dec 1998) ...

plaice
<zoology> A European food fish (Pleuronectes platessa), allied to the flounder, and growing to the weight of eight or ten pounds or more. ... A large American flounder (Paralichthys dentatus; called also brail, puckermouth, and summer flounder. The name is sometimes applied to other allied species. ... Alternative forms: plaise] Plaice mouth, a …

plaid
1. A rectangular garment or piece of cloth, usually made of the checkered material called tartan, but sometimes of plain gray, or gray with black stripes. It is worn by both sexes in Scotland. ... 2. Goods of any quality or material of the pattern of a plaid or tartan; a checkered cloth or pattern. ... Origin: Gael. Plaide a blanket or plaid, contr. …

plain
To lament; to bewail; to complain. 'We with piteous heart unto you pleyne.' (Chaucer) ... Origin: OE. Playne, pleyne, fr. F. Plaindre. See Plaint. ... 1. Without elevations or depressions; flat; level; smooth; even. See Plane. 'The crooked shall be made straight, and the rough places plain.' (Isa. Xl. 4) ... 2. Open; clear; unencumbered; equal; fair. …

plain film
A radiograph made without use of a contrast medium. ... (05 Mar 2000) ...

plait
1. A flat fold; a doubling, as of cloth; a pleat; as, a box plait. 'The plaits and foldings of the drapery.' (Addison) ... 2. A braid, as of hair or straw; a plat. Polish plait. ... <medicine> Same as Plica. ... Origin: OE. Playte, OF. Pleit, L. Plicatum, plicitum, p.p. Of plicare to fold, akin to plectere to plait. See Ply, and cf. Plat to weav …

plakalbumin
<protein> Fragment of ovalbumin produced by subtilisin cleavage: more soluble than ovalbumin itself. ... (18 Nov 1997) ...

plakins
Bactericidal substances similar to leucins extracted from blood platelets. ... Origin: G. Plax, plakos, anything flat, + -in ... (05 Mar 2000) ...

plakoglobin
<protein> Polypeptide (83 kD) present at cell cell but not cell substratum contacts. Associated with desmosomes and with adherens junctions: soluble 7S form present in cytoplasm. ... (18 Nov 1997) ...

plan
1. A draught or form; properly, a representation drawn on a plane, as a map or a chart; especially, a top view, as of a machine, or the representation or delineation of a horizontal section of anything, as of a building; a graphic representation; a diagram. ... 2. A scheme devised; a method of action or procedure expressed or described in language; …

plan apochromatic objective lens
<physics> A modern, high-numerical aperture microscope objective lens designed with high degrees of corrections for various aberrations. It is corrected for spherical aberration in four wavelengths (dark blue, blue, green, and red), for chromatic aberration in more than these four wavelengths, and for flatness of field. A single Plan Apo obje …

plana
Plural of planum. ... Origin: L. ... (05 Mar 2000) ...

planarians
Nonparasitic free-living flatworms of the class turbellaria. The most common genera are dugesia, formerly planaria, which lives in water, and bipalium, which lives on land. Geoplana occurs in south america and california. ... (12 Dec 1998) ...

planchet
A small, flat plate or dish used to support a sample for radioactivity determination; the sample is usually evaporated on (in) the planchet. ... Origin: Fr. Planchette, dim. Of planche, plank ... (05 Mar 2000) ...

planchette
1. A circumferentor. See Circumferentor. ... 2. A small tablet of wood supported on casters and having a pencil attached. The characters produced by the pencil on paper, while the hand rests on the instrument and it is allowed to move, are sometimes translated as of oracular or supernatural import. ... Origin: F. See Planchet. ... Source: Websters Dic …

Planck, Max
<person> German physicist and Nobel laureate, 1858-1947. ... See: Planck's constant, Planck's theory. ... (05 Mar 2000) ...

Planck's constant
A constant, 6.6260755 &times; 10-34 J - s (joule-seconds) or 6.6260755 &times; 10-27 erg-seconds = 6.6260755 &times; 10-34 J Hz-1 (joule per hertz). ... (05 Mar 2000) ...

Planck's theory
Synonym for quantum theory ... The theory that the radiation and absorption of energy take place in definite quantities called quanta (e) which vary in size and are defined by the equation e=hv in which h is planck's constant and v is the frequency of the radiation. ... (12 Dec 1998) ...

plane
1. To make smooth; to level; to pare off the inequalities of the surface of, as of a board or other piece of wood, by the use of a plane; as, to plane a plank. ... 2. To efface or remove. 'He planed away the names . . . Written on his tables.' (Chaucer) ... 3. Figuratively, to make plain or smooth. 'What student came but that you planed her path.' (T …

plane joint
A synovial joint in which the opposing surfaces are nearly planes and in which there is only a slight, gliding motion, as in the intermetacarpal joints. ... Synonym: articulatio plana, arthrodia, arthrodial articulation, arthrodial joint, gliding joint. ... (05 Mar 2000) ...

plane of incidence
The plane perpendicular to a lens surface that contains the incident light ray. ... (05 Mar 2000) ...

plane of inlet
Synonym for superior pelvic aperture ... The upper opening of the true pelvis, bounded anteriorly by the pubic symphysis and the pubic crest on either side, laterally by the iliopectineal lines, and posteriorly by the promontory of the sacrum. ... Synonym: apertura pelvis superior, aditus pelvis, first parallel pelvic plane, pelvic brim, pelvic inlet …

plane of least pelvic dimensions
Synonym for pelvic plane of least dimensions ... The plane that extends from the end of the sacrum to the inferior border of the pubic symphysis; it is bounded posteriorly by the end of the sacrum, laterally by the ischial spines, and anteriorly by the inferior border of the pubic symphysis. ... Synonym: midplane, plane of least pelvic dimensions, pl …

plane of midpelvis
Synonym for pelvic plane of least dimensions ... The plane that extends from the end of the sacrum to the inferior border of the pubic symphysis; it is bounded posteriorly by the end of the sacrum, laterally by the ischial spines, and anteriorly by the inferior border of the pubic symphysis. ... Synonym: midplane, plane of least pelvic dimensions, pl …

plane of outlet
Synonym for inferior pelvic aperture ... The lower opening of the true pelvis, bounded anteriorly by the pubic arch, laterally by the rami of the ischium and the sacrotuberous ligament on either side, and posteriorly by these ligaments and the tip of the coccyx. ... Synonym: apertura pelvis inferior, apertura pelvis minoris, fourth parallel pelvic pl …

plane of pelvic canal
Synonym for pelvic axis ... A hypothetical curved line joining the centre point of each of the four planes of the pelvis, marking the centre of the pelvic cavity at every level. ... Synonym: axis pelvis, plane of pelvic canal. ... (05 Mar 2000) ...

plane of regard
An imaginary plane through which the point of regard moves as the eyes are turned from side to side. ... (05 Mar 2000) ...

plane suture
A simple firm apposition of two smooth surfaces of bones, without overlap, as seen in the lacrimomaxillary suture. ... Synonym: sutura plana, harmonia, harmonic suture. ... (05 Mar 2000) ...

plane wart
Synonym for verruca plana ... A smooth, flat, flesh-coloured wart of small size, occurring in groups, seen especially on the face of the young; often associated with common warts of the hands, due to human papilloma virus, commonly, types 3 and 10. ... Synonym: flat wart, plane wart, verruca plana juvenilis. ... (05 Mar 2000) ...

plane wave
<microscopy> Wave in which wavefronts are parallel to a plane normal to the direction of propagation. ... (05 Aug 1998) ...

plane-polarized light
<chemistry> Light which is passed through a filter which blocks out all the light except that which ocillates in one plane. ... (09 Jan 1998) ...

plane, focal
<microscopy> A plane through the focal point perpendicular to the principle axis of a lens or mirror. ... (05 Aug 1998) ...

planes of reference
Plane's which act as a guide to the location of other plane's. ... (05 Mar 2000) ...

planet
1. <astronomy> A celestial body which revolves about the sun in an orbit of a moderate degree of eccentricity. It is distinguished from a comet by the absence of a coma, and by having a less eccentric orbit. See Solar system. ... The term planet was first used to distinguish those stars which have an apparent motion through the constellations …

planetary
1. Of or pertaining to the planets; as, planetary inhabitants; planetary motions; planetary year. ... 2. Consisting of planets; as, a planetary system. ... 3. <astronomy> Under the dominion or influence of a planet. 'Skilled in the planetary hours.' ... 4. Caused by planets. 'A planetary plague.' ... 5. Having the nature of a planet; erratic; rev …

planets
Heavenly bodies with their own motion among the stars, revolving, in the case of the solar system, around the sun, along the plane of the ecliptic. They are grouped into inner planets and outer planets, based on distance from the sun and common characteristics. ... (12 Dec 1998) ...

planigraphy
Synonym: tomography. ... Origin: L. Planum, plane, + G. Graphe, a writing ... (05 Mar 2000) ...

planimeter
An instrument formed of jointed levers with a recording index, used for measuring the area of any surface, by tracing its boundaries. ... Origin: L. Planum, plane, + G. Metron, measure ... (05 Mar 2000) ...

planimetry
The measurement of surface areas and perimeters by tracing the boundaries. Planimetry on photomicrographs or projected images may be used to evaluate the size of cells. ... (05 Mar 2000) ...

planithorax
A diagram of the chest showing the front and back in plane projection, after the manner of Mercator's projection of the earth's surface. ... (05 Mar 2000) ...

plank
1. To cover or lay with planks; as, to plank a floor or a ship. 'Planked with pine.' ... 2. To lay down, as on a plank or table; to stake or pay cash; as, to plank money in a wager. ... 3. To harden, as hat bodies, by felting. ... 4. To splice together the ends of slivers of wool, for subsequent drawing. Planked shad, shad split open, fastened to a pl …

plankter
Any type of plankton. ... (05 Mar 2000) ...

plankton
<marine biology> Small (often microscopic) plants and animals floating, drifting or weakly swimming in bodies of fresh or salt water. ... (31 Dec 1997) ...