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

Blalock-Taussig operation
An operation for congenital malformations of the heart, in which an abnormally small volume of blood passes through the pulmonary circuit; blood from the systemic circulation is directed to the lungs by anastomosing the right or left subclavian artery to the right or left pulmonary artery. ... (05 Mar 2000) ...

Blalock-Taussig shunt
A palliative subclavian artery to pulmonary artery anastomosis. ... (05 Mar 2000) ...

Blalock, Alfred
<person> U.S. Surgeon, 1899-1965. ... See: Blalock shunt, Blalock-Hanlon operation, Blalock-Taussig operation, Blalock-Taussig shunt. ... (05 Mar 2000) ...

blanch
1. To take the colour out of, and make white; to bleach; as, to blanch linen; age has blanched his hair. ... 2. <botany> To bleach by excluding the light, as the stalks or leaves of plants, by earthing them up or tying them together. ... 3. To make white by removing the skin of, as by scalding; as, to blanch almonds. To whiten, as the surface o …

bland diet
A regular diet omitting foods that mechanically or chemically irritate the gastrointestinal tract. ... (05 Mar 2000) ...

bland embolism
Embolism by simple nonseptic material. ... (05 Mar 2000) ...

bland infarct
An uninfected infarct. ... (05 Mar 2000) ...

Blandin, Philippe Frederic
<person> French anatomist and surgeon, 1798-1849. ... See: Blandin's gland. ... (05 Mar 2000) ...

Blandin's gland
Synonym for anterior lingual gland ... One of the small mixed glands deeply placed near the apex of the tongue on each side of the frenulum. ... Synonym: glandula lingualis anterior, apical gland, Bauhin's gland, Blandin's gland, Nuhn's gland. ... (05 Mar 2000) ...

blank
1. Of a white or pale colour; without colour. 'To the blank moon Her office they prescribed.' (Milton) ... 2. Free from writing, printing, or marks; having an empty space to be filled in with some special writing; said of checks, official documents, etc.; as, blank paper; a blank check; a blank ballot. ... 3. Utterly confounded or discomfited. 'Adam …

blanket suture
A continuous lock-stitch used to approximate the skin of a wound. ... (05 Mar 2000) ...

blas
Term invented by van Helmont to denote a mystical spirit or vital force which presided over and governed the various processes of the body. Each bodily function was supposed to have its own special blas; blas appears to be the counterpart of the archaeus of Paracelsus. ... Origin: a Middle E. Variant of blast ... (05 Mar 2000) ...

Blasius, Gerhard
<person> 17th century Dutch anatomist. ... See: Blasius' duct. ... (05 Mar 2000) ...

Blasius' duct
Synonym for parotid duct ... The duct of the parotid gland opening from the cheek into the vestibule of the mouth opposite the neck of the superior second molar tooth. ... Synonym: ductus parotideus, Blasius' duct, Stensen's duct, Steno's duct. ... (05 Mar 2000) ...

blast
1. <biology, suffix> A suffix or terminal formative, used principally in biological terms, and signifying growth or formation. An immature precursor cell of the type indicated by the preceding word, for example; bioblast, epiblast, mesoblast, etc. ... 2. A violent gust of wind. A forcible stream of air from an orifice, as from a bellows, the m …

blast cell
<haematology> A immature cell of a proliferative compartment in a cell lineage that normally represent up to 5% of the cells in the bone marrow. ... An over-production of blasts in the marrow is characteristic of leukaemia when the blast cells often spill out into the blood stream. ... (17 Mar 1998) ...

blast crisis
<haematology> In patients with chronic myelogenous leukaemia, the progression of the diseases to an acute advanced phase, evidenced by an increased number of immature white blood cells in the circulating blood. ... Sometimes loosely used to describe a rapid increase in the white blood cell count of any leukaemic patient. ... (17 Mar 1998) ...

blast injuries
Injuries resulting when a person is struck by particles impelled with violent force from an explosion. Blast causes pulmonary concussion and haemorrhage, laceration of other thoracic and abdominal viscera, ruptured ear drums, and minor effects in the central nevous system. ... (12 Dec 1998) ...

blast injury
Tearing of lung tissue or rupture of abdominal viscera without external injury, as by the force of an explosion. ... (05 Mar 2000) ...

blast phase
Refers to advanced chronic myelogenous leukaemia. In this phase, the number of immature, abnormal white blood cells in the bone marrow and blood is extremely high. Also called blast crisis. ... (12 Dec 1998) ...

blast transformation
<haematology> The morphological and biochemical changes in lymphocytes, both B and T, on exposure to antigen or to a mitogen. The cells appear to move from G0 to G1 stage of the cell cycle. They usually enlarge and proceed to S phase and mitosis later. The process probably involves receptor cross linking on the plasma membrane. ... (18 Nov 199 …

blastema
<cell biology, embryology> A group of cells in an organism that will develop into a new individual by asexual reproduction or into an organised structure during regeneration. ... (17 Mar 1998) ...

blastemic
Relating to the blastema. ... (05 Mar 2000) ...

blastic
1. Describing the formation of a conidium by the blowing out process of a fertile hypha before being limited by a septum. ... 2. Colloquial term for osteoblastic. ... Origin: G. Blastos, germ + -ic ... (05 Mar 2000) ...

blasticidin S deaminase
<enzyme> Catalyses deamination of cytosine moiety of blasticidin s ... Registry number: EC 3.5.4.23 ... (26 Jun 1999) ...

blasticidin S-acetyltransferase
<enzyme> Ftrom streptoverticillum sp. Jcm4673 ... Registry number: EC 2.3.1.- ... Synonym: bls gene product ... (26 Jun 1999) ...

blasto-
Pertaining to the process of budding (and the formation of buds) by cells or tissue. ... Origin: G. Blastos, germ ... (05 Mar 2000) ...

blastocele
The cavity in the blastula of a developing embryo. ... Synonym: blastocoele, cleavage cavity, segmentation cavity. ... Origin: blasto-+ G. Koilos, hollow ... (05 Mar 2000) ...

blastocelic
Relating to the blastocele. ... Synonym: blastocoelic. ... (05 Mar 2000) ...

blastocladiella
A genus of aquatic fungi of the order blastocladiales, subdivision mastigomycotina, used in the study of zoospore formation. ... (12 Dec 1998) ...

blastocoel
The cavity formed within the mass of cells of the blastula of many animals during the later stages of cleavage. ... (18 Nov 1997) ...

blastocoele
Synonym for blastocele ... The cavity in the blastula of a developing embryo. ... Synonym: blastocoele, cleavage cavity, segmentation cavity. ... Origin: blasto-+ G. Koilos, hollow ... (05 Mar 2000) ...

blastocoelic
Synonym for blastocelic ... Relating to the blastocele. ... Synonym: blastocoelic. ... (05 Mar 2000) ...

Blastoconidium
A holoblastic conidium that is produced singly or in chains, and detached at maturity leaving a bud scar, as in the budding of a yeast cell. ... Synonym: blastospore. ... Origin: blasto-+ conidium ... (05 Mar 2000) ...

blastocyst
In mammalian development, cleavage produces a thin walled hollow sphere, whose wall is the trophoblast, with the embryo proper being represented by a mass of cells at one side. The blastocyst is formed before implantation and is equivalent to the blastula. ... (18 Nov 1997) ...

blastocystina
A suborder of protozoa of the class lobosea. ... (12 Dec 1998) ...

blastocystis
A genus of protozoa of the suborder blastocystina. It was first classified as a yeast but further studies have shown it to be a protozoan. ... (12 Dec 1998) ...

blastocystis hominis
A species of parasitic protozoa found in the intestines of humans and other primates. It was classified as a yeast in 1912. Over the years, questions arose about this designation. In 1967, many physiological and morphological b. Hominis characteristics were reported that fit a protozoan classification. Since that time, other papers have corroborate …

blastocystis infections
Infections with protozoa of the genus blastocystis. The species b. Hominis is responsible for most infections. Surveys have generally found small numbers of this species in human stools submitted for parasitologic studies, with higher positivity rates and organism numbers being reported in aids patients and patients with other immunosuppressive dis …

blastocyte
An undifferentiated blastomere of the morula or blastula stage of an embryo. ... Origin: blasto-+ G. Kytos, cell ... (05 Mar 2000) ...

blastocytoma
Synonym for blastoma ... <tumour> A neoplasm composed chiefly or entirely of immature undifferentiated cells (i.e., blast forms), with little or virtually no stroma. ... Synonym: blastocytoma, embryonal carcinosarcoma. ... Origin: blasto-+ G. -oma, tumour ... (05 Mar 2000) ...

blastoderm
In many eggs with a large amount of yolk, cell division (cleavage) is restricted to a superficial layer of the fertilized egg (meroblastic cleavage). This layer is termed the blastoderm. In birds it is a flat disc of cells at one pole of the egg and in insects an outer layer of cells surrounding the yolk mass. ... (18 Nov 1997) ...

blastodermal
Relating to the blastoderm. ... (05 Mar 2000) ...

blastodermic disk
The aggregation of blastomeres of a telolecithal ovum after cleavage has occurred. ... (05 Mar 2000) ...

blastodermic ectoderm
External layer of the blastula. ... (05 Mar 2000) ...

blastodermic layers
The primordial cell layer's on the yolk surface of a telolecithal egg; in the earliest stages they consist of protoderm, and they later differentiate into ectoderm, endoderm, and mesoderm. ... (05 Mar 2000) ...

blastodermic vesicle
Synonym for blastocyst ... In mammalian development, cleavage produces a thin walled hollow sphere, whose wall is the trophoblast, with the embryo proper being represented by a mass of cells at one side. The blastocyst is formed before implantation and is equivalent to the blastula. ... (18 Nov 1997) ...

blastodisk
1. The disk of active cytoplasm at the animal pole of a telolecithal egg. ... 2. The blastoderm, especially in very young stages when its extent is small. ... (05 Mar 2000) ...

blastogenic
Relating to blastogenesis. ... (05 Mar 2000) ...

blastolysis
Dissolution or destruction of the blastocyst or blast cells and subsequent death. ... Origin: blasto-+ G. Lysis, loosening ... (05 Mar 2000) ...

blastolytic
Relating to blastolysis. ... (05 Mar 2000) ...

blastoma
<tumour> A neoplasm composed chiefly or entirely of immature undifferentiated cells (i.e., blast forms), with little or virtually no stroma. ... Synonym: blastocytoma, embryonal carcinosarcoma. ... Origin: blasto-+ G. -oma, tumour ... (05 Mar 2000) ...

blastomere
One of the cells produced as the result of cell division, cleavage, in the fertilized egg. ... (18 Nov 1997) ...

blastomeres
The undifferentiated cells formed by cleavage of the fertilised ovum. This includes cells in the cleavage, morula, and blastula stages of the embryo. ... (12 Dec 1998) ...

blastomerotomy
Synonym: blastotomy. ... Origin: blastomere + G. Tome, incision ... (05 Mar 2000) ...

blastomogenic
Causing or producing a blastoma. ... (05 Mar 2000) ...

blastomyces
A deuteromycetous fungal genus, a species of which, blastomyces dermatitidis, causes blastomycosis. ... (12 Dec 1998) ...

Blastomyces dermatitidis
A dimorphic soil fungus that causes blastomycosis. It grows in mammalian tissues as budding cells and in culture as a white to buff-coloured filamentous fungus bearing spherical or ovoid conidia on terminal or lateral short, slender conidiophores. In its perfect (teleomorph) state it is known as Ajellomyces dermatitidis. ... Origin: blasto-+ G. Myke …

blastomycetic dermatitis
A cutaneous form of blastomycosis. ... (05 Mar 2000) ...

blastomycin
An antigen for intradermal testing prepared from sterile filtrates of cultures of the filamentous form of Blastomyces dermatitidis. ... (05 Mar 2000) ...

blastomycosis
A fungal infection caused by Blastomyces dermatitidis. This rare fungal infection may produce inflammatory lesion of the skin or lungs or present as a disseminated disease to the skin, lungs, bones, liver, spleen and central nervous system. Uncommon unless patient is immunocompromised (AIDS). ... (27 Sep 1997) ...

blastoneuropore
A temporary opening formed in some embryos by the union of the blastopore and neuropore. ... Origin: blasto-+ neuropore ... (05 Mar 2000) ...

blastopore
During gastrulation cells on the surface of the embryo move into the interior to form the mesoderm and endoderm. The opening formed by this invagination of cells is the blastopore. It is an opening from the archenteron, the primitive gut, to the exterior. In some animals this opening becomes the anus, whilst in others it closes up and the anus open …

blastoporic canal
An obsolete term for primitive pit. ... (05 Mar 2000) ...

blastospore
Synonym: Blastoconidium. ... Origin: blasto-+ G. Sporos, seed ... (05 Mar 2000) ...

blastotomy
<procedure> Experimental destruction of one or more blastomeres. ... Synonym: blastomerotomy. ... Origin: blasto-+ G. Tome, incision ... (05 Mar 2000) ...

blasts
Immature blood cells. ... (12 Dec 1998) ...

blastula
<embryology> Stage of embryonic development of animals near the end of cleavage but before gastrulation. In animals where cleavage (cell division) involves the whole egg, the blastula usually consists of a hollow ball of cells. ... (18 Nov 1997) ...

blastular
Pertaining to the blastula. ... (05 Mar 2000) ...

blastulation
Formation of the blastula or blastocyst from the morula. ... (05 Mar 2000) ...

Blatin, Marc
<person> French physician, *1878. ... See: Blatin's syndrome. ... (05 Mar 2000) ...

Blatin's syndrome
Synonym for hydatid thrill ... The peculiar trembling or vibratory sensation felt on palpation of a hydatid cyst. ... Synonym: Blatin's syndrome, hydatid fremitus. ... (05 Mar 2000) ...

Blatta
A genus of insects (family Blattidae) that includes the abundant oriental cockroach, Blatta orientalis. The dried insect yields antihydropin, a diuretic principle. ... Origin: L. Cockroach ... (05 Mar 2000) ...

Blattella
A genus of cockroaches, (family Blattidae) that includes Blattella germanica, the German cockroach or croton bug, probably the most familiar and widespread of the cockroaches. ... Origin: L. Blatta, cockroach ... (05 Mar 2000) ...

Blattidae
A family of insects (order Blattaria) consisting of over 4,000 species of cockroaches, largely tropical but worldwide in distribution, including a number of abundant pests of households, kitchens, and institutions or facilities, wherever food is present; noxious wherever found, yet not positively incriminated in natural transmission of pathogenic o …

blaze
1. A stream of gas or vapor emitting light and heat in the process of combustion; a bright flame. 'To heaven the blaze uprolled.' ... 2. Intense, direct light accompanied with heat; as, to seek shelter from the blaze of the sun. 'O dark, dark, dark, amid the blaze of noon!' (Milton) ... 3. A bursting out, or active display of any quality; an outburst …

bleach
To make white, or whiter; to remove the colour, or stains, from; to blanch; to whiten. 'The destruction of the colouring matters attached to the bodies to be bleached is effected either by the action of the air and light, of chlorine, or of sulphurous acid.' (Ure) 'Immortal liberty, whose look sublime Hath bleached the tyrant's cheek in every varyi …

bleached wax
Synonym for white wax ... Yellow wax bleached by being rolled very thin and exposed to the light and air, or bleached by chemical oxidants; same uses as yellow wax. ... Synonym: bleached wax, white beeswax. ... (05 Mar 2000) ...

bleaching powder
Synonym for chlorinated lime ... A mixture of varying proportions of complexes of chlorine with calcium oxide and calcium hydroxide. Contains 24-37% available chlorine. Decomposes in moist conditions to liberate chlorine. Strong irritant due to chlorine vapors. Used for disinfecting drinking water, sewage etc.; in the bleaching of wood pulp, linen, …

bleareye
<ophthalmology> A disease of the eyelids, consisting in chronic inflammation of the margins, with a gummy secretion of sebaceous matter. ... Blepharitis accompanied by a viscid discharge that tends to cause the lid edges to cling together. ... Synonym: lippitude, lippitudo. ... (06 Mar 2000) ...

bleary eye
Sore, runny, watery eye with an associated lackluster appearance and, by extension, dimness of vision. ... (05 Mar 2000) ...

bleb
<cell biology> Protrusion from the surface of a cell, usually approximately hemispherical, may be filled with fluid or supported by a meshwork of microfilaments. ... (18 Nov 1997) ...

bleb vs. Bulla
<radiology> Bleb collection of air within layers of viscera pleura, bulla air-filled, thin-walled space within lung (destruction of alveoli), cyst congenital: bronchial or bronchogenic cyst ... (12 Dec 1998) ...

bleed
1. To emit blood; to lose blood; to run with blood, by whatever means; as, the arm bleeds; the wound bled freely; to bleed at the nose. ... 2. To withdraw blood from the body; to let blood; as, Dr. A. Bleeds in fevers. ... 3. To lose or shed one's blood, as in case of a violent death or severe wounds; to die by violence. 'Caesar must bleed.' 'The lam …

bleeding polyp
Synonym: vascular polyp. ... (05 Mar 2000) ...

bleeding time
<haematology> A test which measures the time it takes for small blood vessels to close off and bleeding to stop. Abnormal results can be seen in those with congenital or acquired platelet function disorders or thrombocytopenia. ... (27 Sep 1997) ...

blemish
Any mark of deformity or injury, whether physical or moral; anything; that diminishes beauty, or renders imperfect that which is otherwise well formed; that which impairs reputation. 'He shall take two he lambs without blemish, and one ewe lamb of the first year without blemish.' (Lev. Xiv. 10) 'The reliefs of an envious man are those little blemis …

blende
<chemical> A mineral, called also sphalerite, and by miners mock lead, false galena, and black-jack. It is a zinc sulphide, but often contains some iron. Its colour is usually yellow, brown, or black, and its luster resinous. ... A general term for some minerals, chiefly metallic sulphides which have a somewhat brilliant but nonmetallic luster …

blending inheritance
Galton's term for inheritance in which no component is conspicuous or obtrusive. ... (05 Mar 2000) ...

blennadenitis
Inflammation of the mucous glands. ... Origin: G. Blennos, mucus, + aden, gland, + -itis, inflammation ... (05 Mar 2000) ...

blennemesis
Rarely used term for vomiting of mucus. ... Origin: G. Blennos, mucus, + emesis, vomiting ... (05 Mar 2000) ...

blenno-
Blenn- ... Mucus. ... Origin: G. Blenna, blennos ... (05 Mar 2000) ...

blennogenic
Synonym: muciparous. ... Origin: blenno-+ G. -gen, to produce ... (05 Mar 2000) ...

blennoid
Synonym: muciform. ... Origin: blenno-+ G. Eidos, resemblance ... (05 Mar 2000) ...

blennophthalmia
Synonym: conjunctivitis. ... Synonym: gonorrhoeal ophthalmia. ... (05 Mar 2000) ...

blennorrhagia
Synonym: blennorrhoea. ... Origin: blenno-+ G. Rhegnymi, to burst forth ... (05 Mar 2000) ...

blennorrhagic
Synonym for blennorrhoeal ... Rarely used term relating to blennorrhoea. ... Synonym: blennorrhagic. ... (05 Mar 2000) ...

blennorrhoea
1. Rarely used term for any mucous discharge, especially from the urethra or vagina. ... 2. In ophthalmic usage, was synonymous with conjunctivitis, but is now obsolete. ... Synonym: blennorrhagia, myxorrhoea. ... Origin: blenno-+ G. Rhoia, a flow ... (05 Mar 2000) ...

blennorrhoea conjunctivalis
Synonym for gonorrhoeal ophthalmia ... Acute purulent conjunctivitis excited by Neisseria gonorrhoeae. ... Synonym: blennophthalmia, blennorrhoea conjunctivalis, gonorrhoeal conjunctivitis. ... (05 Mar 2000) ...

blennorrhoea neonatorum
Synonym for ophthalmia neonatorum ... Acute conjunctival inflammation in the newborn, usually caused by maternal gonococcal infection. The causative agent is neisseria gonorrhoeae. The baby's eyes are contaminated during passage through the birth canal. ... (12 Dec 1998) ...