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

megakaryophthisis
Degeneration of the megakaryocytes. ... (09 Oct 1997) ...

megalecithal
Denoting an egg rich in yolk, as in bony fishes, reptiles, and birds. ... Origin: mega-+ G. Lekithos, yolk ... (05 Mar 2000) ...

megalgia
Very severe pain. ... Origin: mega-+ G. Algos, pain ... (05 Mar 2000) ...

megalo-
<prefix> Combining forms signifying: great, extended, powerful; as, megascope, megacosm. ... A million times, a million of; as, megameter, a million meters; megafarad, a million farads; megohm, a million ohms. ... Origin: Gr. Megas, gen. Megaloy, great. ... (29 Oct 1998) ...

megaloblast
<haematology> A large nucleated cell which is the precurson to alterations of the red blood cell sequence, these cells are found almost exclusively in people with pernicious anaemia. ... (29 Oct 1998) ...

megaloblastic
<haematology> A large abnormal red blood cell appearing in the blood in pernicious anaemia. ... (18 Nov 1997) ...

megaloblastic anaemia
Any anaemia in which there is a predominant number of megaloblastic erythroblasts, and relatively few normoblasts, among the hyperplastic erythroid cells in the bone marrow (as in pernicious anaemia). ... (05 Mar 2000) ...

megalocardia
<cardiology> Having an abnormally large heart. ... Origin: Gr. Kardia = heart ... (29 Oct 1998) ...

megalocephaly
Synonym for megacephaly ... A condition, either congenital or acquired, in which the head is abnormally large; usually applied to an adult skull with a capacity of over 1450 ml. ... Synonym: leontiasis ossea, macrocephaly, macrocephalia, megacephalia, megalocephaly, megalocephalia, Virchow's disease. ... Origin: mega-+ G. Kephale, head ... (05 Mar 2000 …

megalocheiria
Megalochiria ... Synonym: macrocheiria. ... Origin: megalo-+ G. Cheir, hand ... (05 Mar 2000) ...

megalocornea
Synonym for keratoglobus ... Congenital anomaly consisting of an enlarged anterior segment of the eye. ... Synonym: anterior megalophthalmos, megalocornea. ... Origin: kerato-+ L. Globus, ball ... (05 Mar 2000) ...

megalocystis
Synonym: megacystis. ... Origin: megalo-+ G. Kystis, bladder ... (05 Mar 2000) ...

megalocythemia
Synonym for macrocythemia ... The occurrence of unusually large numbers of macrocytes in the circulating blood. ... Synonym: macrocytosis, megalocythemia, megalocytosis. ... Origin: macrocyte + G. Haima, blood ... Hyperchromatic macrocythemia, an inexact term frequently used for macrocytes that contain an unusually large amount of haemoglobin, but are …

megalocytic anaemia
Synonym for macrocytic anaemia ... Any anaemia in which the average size of circulating erythrocytes is greater than normal, i.e., the mean corpuscular volume is 94 cu um or more (normal range, 82 to 92 cu um), including such syndromes as pernicious anaemia, sprue, coeliac disease, macrocytic anaemia of pregnancy, anaemia of diphyllobothriasis, and …

megalocytosis
Synonym for macrocythemia ... The occurrence of unusually large numbers of macrocytes in the circulating blood. ... Synonym: macrocytosis, megalocythemia, megalocytosis. ... Origin: macrocyte + G. Haima, blood ... Hyperchromatic macrocythemia, an inexact term frequently used for macrocytes that contain an unusually large amount of haemoglobin, but are …

megalodactylia
Synonym for megadactyly ... Condition characterised by enlargement of one or more digits (fingers or toes). ... Synonym: dactylomegaly, macrodactylia, macrodactylism, macrodactyly, megalodactylia, megalodactylism, megalodactyly. ... Origin: mega-+ G. Daktylos, digit ... (05 Mar 2000) ...

megalodontia
Synonym for macrodontia ... Macrodontism ... The state of having abnormally large teeth. ... Synonym: megadontism, megalodontia. ... (05 Mar 2000) ...

megaloencephalic
Denoting an abnormally large brain. ... (05 Mar 2000) ...

megaloencephalon
An abnormally large brain. ... Synonym: macroencephalon. ... Origin: megalo-+ G. Enkephalos, brain ... (05 Mar 2000) ...

megaloencephaly
Abnormal largeness of the brain. ... Origin: megalo-+ G. Enkephalon, brain ... (05 Mar 2000) ...

megaloenteron
Abnormal largeness of the intestine. ... Synonym: enteromegaly, enteromegalia. ... Origin: megalo-+ G. Enteron, intestine ... (05 Mar 2000) ...

megalogastria
Abnormally large size of the stomach. ... Synonym: macrogastria. ... Origin: megalo-+ G. Gaster, stomach ... (05 Mar 2000) ...

megaloglossia
Synonym: macroglossia. ... Origin: megalo-+ G. Glossa, tongue ... (05 Mar 2000) ...

megalographia
Synonym for macrography ... Rarely used term for writing with very large letters. ... Synonym: megalographia. ... Origin: macro-+ G. Grapho, to write ... (05 Mar 2000) ...

megalohepatia
Synonym for hepatomegaly ... <clinical sign> Enlargement of the liver. ... (18 Nov 1997) ...

megalokaryocyte
Synonym for megakaryocyte ... <haematology> Giant polyploid cell of bone marrow that gives rise to 3-4,000 platelets. ... (18 Nov 1997) ...

megalomania
<psychiatry> A mental condition where the patient is exhibits delusions of grandeur, patient has a greatly enhanced opinion of himself. ... (29 Oct 1998) ...

megalomaniac
A person exhibiting megalomania. ... (05 Mar 2000) ...

megalomelia
Synonym for macromelia ... Abnormal size of one or more of the limbs. ... Synonym: megalomelia. ... Origin: macro-+ G. Melos, limb ... (05 Mar 2000) ...

megalonychosis
Synonym: macronychia. ... Origin: megalo-+ G. Onyx, nail, -osis, condition ... (05 Mar 2000) ...

megalophthalmos
Congenital large globe. ... Synonym: macrophthalmia, megophthalmus. ... Origin: megalo-+ G. Ophthalmos, eye ... (05 Mar 2000) ...

megalopia
Synonym for macropsia ... Perception of objects as larger than they are. ... Synonym: megalopia, megalopsia. ... Origin: macro-+ G. Opsis, vision ... (05 Mar 2000) ...

megalopodia
Synonym: macropodia. ... Origin: megalo-+ G. Pous, foot ... (05 Mar 2000) ...

megalops
1. <zoology> A larva, in a stage following the zoea, in the development of most crabs. In this stage the legs and abdominal appendages have appeared, the abdomen is relatively long, and the eyes are large. Also used adjectively. ... 2. <marine biology> A large fish; the tarpum. ... Origin: NL, fr. Gr. Megas, -aloy, large + 'wps eye. ... (2 …

megalopsia
Synonym for macropsia ... Perception of objects as larger than they are. ... Synonym: megalopia, megalopsia. ... Origin: macro-+ G. Opsis, vision ... (05 Mar 2000) ...

megalosplanchnic
Having abnormally large viscera. ... Synonym: macrosplanchnic. ... Origin: megalo-+ G. Splanchnon, viscus ... (05 Mar 2000) ...

megalosplenia
Synonym for splenomegaly ... <clinical sign> Enlargement of the spleen. ... Origin: Gr. Megas = large ... (18 Nov 1997) ...

megalosyndactyly
Megalosyndactylia ... Condition of webbed or fused fingers or toes of large size. ... Origin: megalo-+ G. Syn, together, + daktylos, finger ... (05 Mar 2000) ...

megaloureter
An enlarged, dilated ureter. ... Synonym: megaureter. ... (05 Mar 2000) ...

megalourethra
Congenital dilation of the urethra. ... (05 Mar 2000) ...

megamerozoite
Synonym for macromerozoite ... A large merozoite. ... Synonym: megamerozoite. ... Origin: macro-+ G. Meros, part, + zoon, animal ... (05 Mar 2000) ...

megameter
<astronomy, instrument> An instrument for determining longitude by observation of the stars. ... Origin: F. Megametre. ... (29 Oct 1998) ...

meganucleus
Synonym for macronucleus ... The larger nucleus (or sometimes nuclei) in ciliate protozoans. Derived from the micronucleus by a process of DNA polytenisation. The DNA in the macronucleus is actively transcribed. The macronucleus degenerates before conjugation. ... (18 Nov 1997) ...

megaprosopia
Synonym: macroprosopia. ... Origin: mega-+ G. Prosopon, face ... (05 Mar 2000) ...

megaprosopous
Synonym for macroprosopous ... Relating to or exhibiting macroprosopia. ... Synonym: megaprosopous. ... (05 Mar 2000) ...

megarectum
Extreme dilation of the rectum. ... (05 Mar 2000) ...

megasigmoid
Synonym for macrosigmoid ... Enlargement or dilation of the sigmoid colon. ... Synonym: megasigmoid. ... (05 Mar 2000) ...

megasomia
Synonym for macrosomia ... Overly large body. A child with macrosomia has significant overgrowth. ... (12 Dec 1998) ...

megaspore
Haploid spore produced by a plant sporophyte, that develops into a female gametophyte. ... (18 Nov 1997) ...

megasporophyll
A specialised leaf upon (or in the axil of) which one or more megasporangia are borne. ... (09 Oct 1997) ...

megateriopeptidase
<enzyme> Amino-endopeptidase ... Registry number: EC 3.4.99.- ... (26 Jun 1999) ...

megathrombocyte
A large blood platelet, especially a young one recently released from the bone marrow. ... Origin: mega-+ G. Thrombos, clot, + kytos, cell ... (05 Mar 2000) ...

megaureter
Synonym for megaloureter ... An enlarged, dilated ureter. ... Synonym: megaureter. ... (05 Mar 2000) ...

megavoltage
In radiation therapy, a term for voltage above one million volts. ... (05 Mar 2000) ...

megawatt
(MW) The electrical unit of power that equals one million Watts (1,000 kW). ... (05 Dec 1998) ...

megestrol
<chemical> 17-hydroxy-6-methylpregna-3,6-diene-3,20-dione. A progestational hormone used most commonly as the acetate ester. As the acetate, it is more potent than progesterone both as a progestagen and as an ovulation inhibitor. It has also been used in the palliative treatment of breast cancer. ... Pharmacological action: antineoplastic agen …

megestrol acetate
An appetite stimulant approved for the treatment of weight loss in people with AIDS. Megestrol acetate is a synthetic version of the female hormone progesterone. ... (09 Oct 1997) ...

meglumine
<chemical> 1-deoxy-1-(methylamino)-d-glucitol. A derivative of sorbitol in which the hydroxyl group in position 1 is replaced by a methylamino group. Often used in conjunction with iodinated organic compounds as contrast medium. ... Chemical name: D-Glucitol, 1-deoxy-1-(methylamino)- ... (12 Dec 1998) ...

meglumine acetrizoate
A radiographic contrast medium. ... See: acetrizoate sodium. ... (05 Mar 2000) ...

meglumine diatrizoate
N-methylglucamine salt of 3,5-diacetamido-2,4,6-triiodobenzoic acid;a water-soluble organic iodine compound used for excretory urography, for contrast visualization of the cardiovascular system, and orally for opacification of the gastrointestinal tract. ... Synonym: methylglucamine diatrizoate. ... (05 Mar 2000) ...

meglumine iothalamate
N-methylglucamine salt of iothalamic acid (60% solution); a diagnostic radiopaque medium for intravascular use in angiography and urography. ... (05 Mar 2000) ...

meglutol
<chemical> An antilipaemic agent which lowers cholesterol, triglycerides, serum beta-lipoproteins and phospholipids. It acts by interfering with the enzymatic steps involved in the conversion of acetate to hydroxymethylglutaryl coenzyme a as well as inhibiting the activity of hydroxymethylglutaryl CoA reductases which is the rate limiting enz …

megophthalmus
Synonym for megalophthalmos ... Congenital large globe. ... Synonym: macrophthalmia, megophthalmus. ... Origin: megalo-+ G. Ophthalmos, eye ... (05 Mar 2000) ...

megoxycyte
Synonym for megoxyphil ... An eosinophilic leukocyte containing coarse granules. ... Synonym: megoxycyte. ... Origin: mega-+ G. Oxys, acid, + phileo, to like ... (05 Mar 2000) ...

megoxyphil
An eosinophilic leukocyte containing coarse granules. ... Synonym: megoxycyte. ... Origin: mega-+ G. Oxys, acid, + phileo, to like ... (05 Mar 2000) ...

megrim
1. A kind of sick or nevrous headache, usually periodical and confined to one side of the head. ... 2. A fancy; a whim; a freak; a humor; especially, in the plural, lowness of spirits. 'These are his megrims, firks, and melancholies.' (Ford) ... 3. <veterinary> A sudden vertigo in a horse, succeeded sometimes by unconsciousness, produced by an …

Meibom, Hendrik
<person> German anatomist, 1638-1700. ... See: meibomian conjunctivitis, meibomian cyst, meibomian glands, meibomian sty. ... (05 Mar 2000) ...

meibomian conjunctivitis
An obsolete term for a conjunctivitis associated with chronic inflammation of the meibomian glands, with swollen tarsal plates and frothy seborrheic secretion. ... Synonym: seborrheic blepharoconjunctivitis. ... (05 Mar 2000) ...

meibomian cyst
An inflammation of the oil gland of the eyelid. Also called a chalazian or a tarsal cyst. ... (12 Dec 1998) ...

meibomian glands
Sebaceous glands between the tarsi and the conjunctiva of the eyelids. ... (12 Dec 1998) ...

meibomian sty
Synonym for hordeolum internum ... An acute purulent infection of a meibomian (tarsal) gland. ... Synonym: acute chalazion, hordeolum meibomianum, meibomian sty. ... (05 Mar 2000) ...

meibomitis
Meibomianitis ... Inflammation of the meibomian glands. ... (05 Mar 2000) ...

Meier, Georg
<person> German serologist, *1875. ... See: Porges-Meier test. ... (05 Mar 2000) ...

meige syndrome
<syndrome> A syndrome characterised by blepharospasm and involuntary facial movements, in the absence of neuroleptic drug therapy. ... (12 Dec 1998) ...

Meige, Henri
<person> French physician, 1866-1940. ... See: Meige's disease. ... (05 Mar 2000) ...

Meige's disease
Autosomal dominant lymphedema with onset at about the age of puberty. ... (05 Mar 2000) ...

meigs syndrome
<radiology> Ovarian fibroma, ascites, hydrothorax ... (12 Dec 1998) ...

Meigs, Joe
<person> U.S. Gynecologist, 1892-1963. ... See: Meigs' syndrome. ... (05 Mar 2000) ...

meigs' syndrome
Ascites and hydrothorax associated with ovarian fibroma or other pelvic tumours. ... (12 Dec 1998) ...

Meinicke test
The first successful application (1917-1918) of immune precipitation to diagnosis of syphilis, now obsolete. ... (05 Mar 2000) ...

Meinicke, Ernst
<person> German physician, 1878-1945. ... See: Meinicke test. ... (05 Mar 2000) ...

meio-
For words beginning thus and not found here, see mio-. ... (05 Mar 2000) ...

meiocyte
Cell that will undergo meiosis, a little used term. ... (18 Nov 1997) ...

meiofauna
Animals ranging in size from approximately 0.1 mm to 1 mm that live within the sediments, the size class of transition from micro- to macrofauna. ... (09 Oct 1997) ...

meiosis
A specialised form of nuclear division in which there two successive nuclear divisions (meiosis I and II) without any chromosome replication between them. Each division can be divided into 4 phases similar to those of mitosis pro, meta, ana and telophase). Meiosis reduces the starting number of 4n chromosomes in the parent cell to n in each of the …

meiotic
Pertaining to meiosis. ... (12 Dec 1998) ...

meiotic division
Synonym for meiosis ... A specialised form of nuclear division in which there two successive nuclear divisions (meiosis I and II) without any chromosome replication between them. Each division can be divided into 4 phases similar to those of mitosis pro, meta, ana and telophase). Meiosis reduces the starting number of 4n chromosomes in the parent ce …

meiotic drive
Differential fitness in males and females. ... (05 Mar 2000) ...

meiotic nondisjunction
Failure of two memberrs of a chromosome pair to separate (disjoin) during meiosis so that both go to one daughter cell and none to the other. This mechanism is responsible for the extra chromosome 21 in trisomy 21 (down syndrome) and for extra and missing chromosomes causing other birth defects and many spontaneous abortions (miscarriages). ... (12 …

meiotic phase
The stage of nuclear changes in the sexual cells during which reduction of the chromosomes takes place; it embraces the cell generations of the spermatocytes and oocytes. ... Synonym: reduction phase. ... (05 Mar 2000) ...

meiotic spindle
The meiotic equivalent of the mitotic spindle. ... (18 Nov 1997) ...

Meissel
Synonym for Wachstein-Meissel stain ... <technique> For calcium-magnesium-ATPase, a method similar to that of Gomori's non-specific acid phosphatase stain, except that incubation is carried out with ATP as substrate at neutral pH; enzyme activity is generally demonstrated at cell membranes. ... (05 Mar 2000) ...

Meissner, Georg
<person> Was Professor of Anatomy and Physiology in Basle, Professor of Zoology and Physiology in Freiburg and Professor of Physiology in Gottingen. ... Meissner's Corpuscles - tactile nerve endings, corpuscula tactus. ... Meissner's Plexus - plexus submucosus of the alimentary tract. ... Lived: 1829-1903. B. Hanover. Nov 29th, 1829, d. 1903. …

Meissner's corpuscle
Synonym for tactile corpuscle ... One of numerous oval bodies found in the papillae of the skin, especially those of the fingers and toes; they consist of a connective tissue capsule in which the axon fibrils terminate around and between a pile of wedge-shaped epithelioid cells. ... Synonym: corpusculum tactus, Meissner's corpuscle, oval corpuscle, t …

Meissner's plexus
Synonym for submucosal plexus ... A gangliated plexus of unmyelinated nerve fibres, derived chiefly from the superior mesenteric plexus, ramifying in the intestinal submucosa. ... Synonym: plexus submucosus, Meissner's plexus, Remak's plexus. ... (05 Mar 2000) ...

MEK kinase
<enzyme> Activates mek1 protein (map-erk kinase); structurally unrelated to raf ... Registry number: EC 2.7.10.- ... Synonym: mekk protein ... (26 Jun 1999) ...

Mekcase
<chemical> Contains bromelain, pancreatin, dehydrocholic acid, iodochlorhydroxyquin and 4,7-phenanthroline-5,6-quinone ... Pharmacological action: gastrointestinal agent ... Chemical name: cholan-24-oic acid, 3,7,12-trioxo-, (5beta)-, mixt. With bromelain juice, 5-chloro-7-iodo-8-quinolinol, pancreatin and 4,7-phenanthroline-5,6-dione ... (26 Ju …

mekong valley
The geographic area of the mekong valley in general or when the specific country or countries are not indicated. Usually includes cambodia, indochina, and laos. ... (12 Dec 1998) ...

mel
1. Unit of pitch; a pitch of 1000 mels results from a simple tone of frequency 1000 Hz, 40 dB above the normal threshold of audibility. ... 2. <prefix> Limb. ... Origin: G. Melos ... 3. A cheek. ... Origin: G. Melon ... 4. Honey, sugar. ... Synonym: honey. ... Origin: L. Mel, mellis, G. Meli, melitos ... (05 Mar 2000) ...

melaena
1. <gastroenterology> The passage of dark, pitchy and grumous stools stained with blood pigments or with altered blood. ... 2. Black vomit. ... Origin: Gr. Melaina, feminine of Gr. Melas = black ... (18 Nov 1997) ...