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

mastoid fontanel
The membranous interval on either side between the mastoid angle of the parietal bone, the petrous portion of the temporal bone, and the occipital bone. ... Synonym: fonticulus mastoideus, fonticulus posterolateralis, Casser's fontanel, posterolateral fontanel. ... (05 Mar 2000) ...

mastoid foramen
An opening at the posterior portion of the mastoid process, transmitting the mastoid branch of the occipital artery to the dura and an emissary vein to the sigmoid sinus. ... Synonym: foramen mastoideum. ... (05 Mar 2000) ...

mastoid fossa
Synonym for suprameatal pit ... A small depression on the mastoid part of the temporal bone, posterior to the suprameatal spine. ... Synonym: foveola suprameatica, mastoid fossa, fossa mastoidea, supramastoid fossa. ... (05 Mar 2000) ...

mastoid groove
The groove medial to the mastoid process of the temporal bone from which the digastric muscle originates. ... Synonym: incisura mastoidea, digastric groove, digastric notch, mastoid notch. ... (05 Mar 2000) ...

mastoid lymph nodes
Synonym for retroauricular lymph nodes ... Two or three nodes in the region of the mastoid process; they receive afferent lymphatic vessels from the scalp and auricle and send efferent vessels to the superior deep cervical nodes. ... Synonym: nodi lymphatici mastoidei, mastoid lymph nodes. ... (05 Mar 2000) ...

mastoid margin of occipital bone
Synonym for mastoid border of occipital bone ... The margin of the occipital squama that articulates with the temporal bone. ... Synonym: margo mastoideus squamae occipitalis, mastoid margin of occipital bone. ... (05 Mar 2000) ...

mastoid notch
Synonym for mastoid groove ... The groove medial to the mastoid process of the temporal bone from which the digastric muscle originates. ... Synonym: incisura mastoidea, digastric groove, digastric notch, mastoid notch. ... (05 Mar 2000) ...

mastoid part of the temporal bone
The portion of the petrous part of the temporal bone bearing the mastoid process. ... Synonym: pars mastoidea ossis temporalis. ... (05 Mar 2000) ...

mastoid process
The nipple-like projection of the petrous part of the temporal bone. ... Synonym: processus mastoideus, mastoid bone, temporal apophysis. ... (05 Mar 2000) ...

mastoid sinuses
Synonym for mastoid air cells ... Numerous small intercommunicating cavities in the mastoid process of the temporal bone that empty into the mastoid or tympanic antrum. ... Synonym: cellulae mastoideae, mastoid cells, mastoid sinuses. ... (05 Mar 2000) ...

mastoid wall of middle ear
Synonym for posterior wall of tympanic cavity ... It contains the opening into the mastoid antrum. ... Synonym: paries mastoideus cavi tympani, mastoid wall of middle ear, posterior wall of middle ear. ... (05 Mar 2000) ...

mastoidal
Synonym for mastoid ... A bony process off the base of the skull that is composed of air cells. Inflammation of the mastoid is known as mastoiditis. ... (27 Sep 1997) ...

mastoidale
The lowest point on the contour of the mastoid process. ... (05 Mar 2000) ...

mastoidectomy
<procedure> Hollowing out of the mastoid process by curretting, gouging, drilling, or otherwise removing the bony partitions forming the mastoid cells. ... Origin: mastoid (process) + G. Ektome, excision ... (05 Mar 2000) ...

mastoiditis
<pathology> Inflammation of the mastoid antrum and cells. ... (18 Nov 1997) ...

mastoncus
A tumour or swelling of the breasts. ... Origin: masto-+ G. Onkos, mass ... (05 Mar 2000) ...

mastoparans
Basic peptides from wasp venoms. Analogous to melittin in honey bee venom they can act as phospholipase A2 activators, but their relevance to the toxic action of the venoms is not known. ... (18 Nov 1997) ...

mastoparietal
Relating to the mastoid portion of the temporal bone and to the parietal bone, denoting the suture uniting them. ... (05 Mar 2000) ...

mastopathy
Any disease of the breasts. ... Synonym: mazopathy, mazopathia. ... Origin: masto-+ G. Pathos, suffering ... (05 Mar 2000) ...

mastopexy
Plastic surgery to affix sagging breasts in a more elevated and normal position, often with some improvement in shape. ... Origin: masto-+ G. Pexis, fixation ... (05 Mar 2000) ...

mastoplasia
Enlargement of the breast. ... Origin: masto-+ G. Plasis, a molding ... (05 Mar 2000) ...

mastoplasty
Synonym: mammaplasty. ... Origin: masto-+ G. Plastos, formed ... (05 Mar 2000) ...

mastoptosis
Ptosis or sagging of the breast. ... Origin: masto-+ G. Ptosis, a falling ... (05 Mar 2000) ...

mastorrhagia
Haemorrhage from a breast. ... Origin: masto-+ G. Rhegnymi, to burst forth ... (05 Mar 2000) ...

mastosquamous
Relating to the mastoid and the squamous portions of the temporal bone. ... (05 Mar 2000) ...

mastosyrinx
A fistula of the mammary gland. ... Origin: masto-+ G. Syrinx, tube ... (05 Mar 2000) ...

mastotomy
<procedure> Incision of the breast. ... Synonym: mammotomy. ... Origin: masto-+ G. Tome, incision ... (05 Mar 2000) ...

masturbate
To practice masturbation. ... Origin: L. Masturbari, pp. Masturbatus ... (05 Mar 2000) ...

masturbation
Sexual stimulation or gratification of the self. ... (12 Dec 1998) ...

Masugi
Matazo, 20th century Japanese pathologist. ... See: Masugi's nephritis. ... (05 Mar 2000) ...

Masugi's nephritis
Glomerulonephritis produced by injecting into rats a rabbit antiserum prepared against rat kidney tissue suspensions. ... (05 Mar 2000) ...

mat
A rapid heart rate that is generated from multiple locations within the atria. Multifocal atrial tachycardia (MAT) tends to be in the range of 100 to 180 beats per minute. MAT can be seen in association with COPD, pneumonia, CHF, lung cancer, diabetes, pulmonary embolism, theophylline toxicity, coronary artery disease or digoxin toxicity. ... (27 Se …

mat gold
Powdered gold formed by electrolytic precipitation, compressed into strips, and sintered. ... (05 Mar 2000) ...

Matas
Rudolph, U.S. Surgeon, 1860-1957. ... See: Matas' operation. ... (05 Mar 2000) ...

Matas' operation
An obsolete term for aneurysmoplasty. ... (05 Mar 2000) ...

match
1. A person or thing equal or similar to another; one able to mate or cope with another; an equal; a mate. 'Government . . . Makes an innocent man, though of the lowest rank, a match for the mightiest of his fellow subjects.' (Addison) ... 2. A bringing together of two parties suited to one another, as for a union, a trial of skill or force, a conte …

matched groups
A method of experimental control in which subjects in one group are matched on a one-to-one basis with subjects in other group's concerning all organism variables (e.g., age, sex, height, weight) which the experimenter believes could influence the variable being investigated. ... (05 Mar 2000) ...

matched-pair analysis
A type of analysis in which subjects in a study group and a comparison group are made comparable with respect to extraneous factors by individually pairing study subjects with the comparison group subjects (e.g., age-matched controls). ... (12 Dec 1998) ...

matching
The process of making a study group and a comparison group in an epidemiological study comparable with respect to extraneous or confounding factors such as age, sex, weight, etc. ... (05 Mar 2000) ...

mate
The Paraguay tea, being the dried leaf of the Brazilian holly (Ilex Paraguensis). The infusion has a pleasant odour, with an agreeable bitter taste, and is much used for tea in South America. ... Origin: Sp. ... 1. One who customarily associates with another; a companion; an associate; any object which is associated or combined with a similar object. …

mater
The 'sheltering' coverings of the central nervous system. ... Origin: L. Mother ... (05 Mar 2000) ...

materia
Substance or matter. ... Origin: L. Substance ... (05 Mar 2000) ...

materia alba
Accumulation or aggregation of microorganisms, desquamated epithelial cells, blood cells and food debris loosely adherent to surfaces of plaques, teeth, gingiva or dental appliances. ... Origin: L. White matter ... (05 Mar 2000) ...

material
1. Consisting of matter; not spiritual; corporeal; physical; as, material substance or bodies. 'The material elements of the universe.' (Whewell) ... 2. Hence: Pertaining to, or affecting, the physical nature of man, as distinguished from the mental or moral nature; relating to the bodily wants, interests, and comforts. ... 3. Of solid or weighty cha …

materialise
1. To invest wich material characteristics; to make perceptible to the senses; hence, to present to the mind through the medium of material objects. 'Having wich wonderful art and beauty materialised, if I may so call it, a scheme of abstracted notions, and clothed the most nice, refined conceptions of philosophy in sensible images.' (Tatler) ... 2. …

materialism
1. The doctrine of materialists; materialistic views and tenets. 'The irregular fears of a future state had been supplanted by the materialism of Epicurus.' (Buckminster) ... 2. The tendency to give undue importance to material interests; devotion to the material nature and its wants. ... 3. Material substances in the aggregate; matter. ... [Cf. F. Ma …

materials management, hospital
The management of all procurement, distribution, and storage of equipment and supplies, as well as logistics management including laundry, processing of reusables, etc. ... (12 Dec 1998) ...

materials recovery facility
A recycling facility for municipal solid waste. ... (05 Dec 1998) ...

materials testing
The testing of materials and devices, especially those used for implants, prostheses, sutures, adhesives, etc., for hardness, strength, durability, safety, and efficacy. ... (12 Dec 1998) ...

materies morbi
The substance acting as the immediate cause of a disease. ... Origin: L. The matter of disease ... (05 Mar 2000) ...

maternal
Relating to or derived from the mother. ... Origin: L. Maternus, fr. Mater, mother ... (05 Mar 2000) ...

maternal age 35 and over
Pregnancy in women 35 or more years of age. It is used for normal pregnancies and for problems of pregnancy occurring in a woman's late reproductive years. These include effects on the mother's physical and mental health as well as risks of perinatal mortality and foetal abnormality. ... (12 Dec 1998) ...

maternal antibody
Any antibody transferred from a mammalian mother transplacentally into the foetus. See under immunoglobulin for details of the classes of Ig that are transferred to the foetus. ... (18 Nov 1997) ...

maternal behaviour
The behaviour patterns associated with or characteristic of a mother. ... (12 Dec 1998) ...

maternal cotyledon
A unit of the placenta made up of trophoblastic cells, fibrous tissue, and abundant blood vessels, which is visible grossly on the maternal surface as an irregularly shaped lobe circumscribed by a deep cleft and made up of a stem villus with numerous branching free villi and anchoring villi; placental vessels in the chorionic plate supply the stem …

maternal death
Death of a woman while pregnant or within 42 days after the termination of gestation, irrespective of the duration and site of pregnancy and the cause of death; two periods are recognised in the 42-day interval: period 1 includes day 1 to day 7; period 2 includes day 8 to day 42. Maternal death's are further classified as: ... (05 Mar 2000) ...

maternal death rate
The number of maternal deaths that occur as the direct result of the reproductive process per 100,000 live births. ... See: rate. ... See: maternal death. ... (05 Mar 2000) ...

maternal deprivation
Prolonged separation of the offspring from the mother. ... (12 Dec 1998) ...

maternal deprivation syndrome
<syndrome> A failure to thrive seen in infants and young children and exhibited as a constellation of physical signs, symptoms, and behaviours, usually associated with maternal loss, absence or neglect, and characterised by lack of responsiveness to the environment and often depression. ... (05 Mar 2000) ...

maternal dystocia
Dystocia caused by an abnormality or physical problem in the mother. ... (05 Mar 2000) ...

maternal effect gene
Gene, usually required for early embryonic development, whose product is secreted into the egg by the mother. The phenotype is thus determined by the mother's, rather than the egg's, genotype. ... Compare:. Zygotic effect gene. ... See: egg polarity gene. ... (18 Nov 1997) ...

maternal exposure
Exposure of the female parent, human or animal, to potentially harmful chemical, physical, or biological agents in the environment or to environmental factors that may include ionizing radiation, pathogenic organisms, or toxic chemicals that may affect offspring. It includes pre-conception maternal exposure. ... (12 Dec 1998) ...

maternal health services
Organised services to provide health care to expectant and nursing mothers. ... (12 Dec 1998) ...

maternal immunity
<epidemiology> Immunity for a neonate provided by IgG antibody generated by a mother and passed across the placenta to the unborn offspring. This provides short lived protection (with a typical half life of 3-6 months) to the neonate. Also known as immunity. ... (05 Dec 1998) ...

maternal inheritance
Inheritance through the maternal cell line, for example through the oocyte and eggs. Mitochondrial genes are maternally inherited and various other nonMendelian forms of inheritance may also appear as maternal inheritance. ... (18 Nov 1997) ...

maternal mortality
Maternal deaths resulting from complications of pregnancy and childbirth in a given population. ... (12 Dec 1998) ...

maternal mortality rate
The number of maternal deaths related to childbearing divided by the number of live births (or by the number of live births + foetal deaths) in that year. The maternal mortality rate in the united states in 1993 (and 1994) was 0.1 per 1,000 live births, or 1 mother dying per 10,000 live births. ... (12 Dec 1998) ...

maternal mRNA
<molecular biology> Messenger RNA found in oocytes and early embryos that is derived from the maternal genome during oogenesis. ... See: masked messenger RNA. ... (18 Nov 1997) ...

maternal placenta
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) ...

maternal serum alpha-fetoprotein
A plasma protein, alpha-fetoprotein (afp) is normally produced by the foetus. The level of afp in the blood serum of pregnant women provides a screening test for open neural tube defects (anencephaly and spina bifida) and for down syndrome (and other chromosome abnormalities). The maternal serum afp (msafp) tends to be unusally high with open neura …

maternal welfare
Organised efforts by communities or organizations to improve the health and well-being of the mother. ... (12 Dec 1998) ...

maternal-child health centres
Facilities which administer the delivery of health care services to mothers and children. ... (12 Dec 1998) ...

maternal-child nursing
The nursing specialty that deals with the care of women throughout their pregnancy and childbirth and the care of their newborn children. ... (12 Dec 1998) ...

maternal-foetal exchange
Exchange of substances between the maternal blood and the foetal blood through the placental barrier. It excludes microbial or viral transmission. ... (12 Dec 1998) ...

maternity
Motherhood. ... Origin: see maternal ... (05 Mar 2000) ...

maternity hospital
A special hospital for the care of women in childbirth. ... (05 Mar 2000) ...

mathematical chaos
A dynamic system so sensitive to its precise current state (which in practice will never be known exactly) that its behaviour, though deterministic, is indistinguishable from random. ... (05 Mar 2000) ...

mathematical computing
Computer-assisted interpretation and analysis of various mathematical functions related to a particular problem. ... (12 Dec 1998) ...

mathematical determinant
A formal algebraic operation on the terms of a square matrix of quantities, fundamental in solving multiple simultaneous equations and widely used in regression analysis, notably in epidemiology and quantitative genetics. If determinant is zero, the equations have no unambiguous solution. ... (05 Mar 2000) ...

mathematical genetics
The study of genetic traits by formal analysis, e.g., quantitative genetics, population dynamics, genetic epidemiology, modeling. ... (05 Mar 2000) ...

mathematical model
<epidemiology> A formal framework to convey ideas about the components of a host-parasite interaction. Construction requires three major types of information: (a) a clear understanding of the interaction within the individual host between the infectious agent and the host, (b) the mode and rate of transmission between individuals, and (c) hos …

mathematics
That science, or class of sciences, which treats of the exact relations existing between quantities or magnitudes, and of the methods by which, in accordance with these relations, quantities sought are deducible from other quantities known or supposed; the science of spatial and quantitative relations. ... Mathematics embraces three departments, nam …

mathieu plier
<dentistry> A special plier which locks when it closes so it holds on to small parts. ... (08 Jan 1998) ...

matin
1. Morning. ... 2. [F. Matines. See Etymol. Above] Morning worship or service; morning prayers or songs. 'The winged choristers began To chirp their matins.' (Cleveland) ... 3. Time of morning service; the first canonical hour in the Roman Catholic Church. ... Origin: F. Fr. L. Matutinum the morning, matutinus of the morning, Matuta the goddess of the …

mating
The pairing of male and female for the purpose of reproduction. ... (05 Mar 2000) ...

mating isolate
A population separated from its neighbors by any means so that all or most matings occur within the population group. ... (05 Mar 2000) ...

mating type gene
Genes that, in Saccharomyces cerevisiae specify into which of the two mating types (a and _) a particular cell falls. Only unlike mating type haploids will fuse. The interest derives from the way in which mating type is switched, the existing gene is removed and a new gene, derived from a (silent) master copy elsewhere in the genome is spliced in. …

matrical
Relating to any matrix. ... Synonym: matricial. ... (05 Mar 2000) ...

matricaria
The flowers of Matricaria chamomilla (family Compositae); used internally as a tonic and externally as a counterirritant. ... See: chamomile. ... Origin: L. Matrix, womb ... (05 Mar 2000) ...

matrices
Plural of matrix. ... Origin: L. ... (05 Mar 2000) ...

matricial
Synonym for matrical ... Relating to any matrix. ... Synonym: matricial. ... (05 Mar 2000) ...

matricide
1. The killing of one's mother. ... Compare: patricide. ... 2. One who commits such an act. ... Origin: L. Mater, mother, + caedo, to kill ... (05 Mar 2000) ...

matrilineal
Denoting descent through the female line. ... Origin: L. Mater, mother, + linea, line ... (05 Mar 2000) ...

matrimony
1. The union of man and woman as husband and wife; the nuptial state; marriage; wedlock. 'If either of you know any impediment, why ye may not be lawfully joined together in matrimony, ye do now confessit.' (Book of Com. Prayer (Eng. Ed)) ... 2. A kind of game at cards played by several persons. ... <botany> Matrimony vine, a climbing thorny vi …

matrix
Ground substance in which things are embedded or that fills a space (as for example the space within the mitochondrion). most common usage is for a loose meshwork within which cells are embedded (e.g. Extracellular matrix), although it may also be used of filters or absorbent material. ... (18 Nov 1997) ...

matrix band
A metal or plastic band secured around the crown of a tooth to confine restorative material to be adapted into a prepared cavity. ... (05 Mar 2000) ...

matrix bands
Devices which provide an artificial temporary wall, or matrix, used in filling a prepared cavity. ... (12 Dec 1998) ...

matrix calculi
<radiology> Radiolucent, associated with Proteus infection, composition: 2/3 mucoprotein, 1/3 mucopolysaccharide see also: renal calculi ... (12 Dec 1998) ...

matrix calculus
A yellowish-white to light tan urinary calculus containing calcium salts, with the consistency of putty; composed chiefly of an organic matrix consisting of a mucoprotein and a sulfated mucopolysaccharide, and usually associated with chronic infection. ... (05 Mar 2000) ...

matrix Gla protein
A calcium binding protein. ... (05 Mar 2000) ...