| clastogenesis | <molecular biology> Any process resulting in the breakage of chromosomes or the loss or rearrangement of pieces of chromosomes. (09 Oct 1997) |
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| clastogenic | <cell biology, pharmacology> This adjective describes any substance or process which causes breaks in chromosomes. Origin: Gr. Gennan = to produce (09 Oct 1997) |
| clastothrix | Synonym: trichorrhexis nodosa. Origin: G. Klastos, broken, + thrix, hair (05 Mar 2000) |
| clathrate | <chemistry> A type of solid in which water molecules form cages that trap a gas, formed by very slowly warming a mixture of the gas and tiny grains of ice. (09 Oct 1997) |
| clathrate crystal | Lattice-like arrangement of molecules of one substance surrounding molecules of another substance. (05 Mar 2000) |
| clathrin | <cell biology> Protein composed of 3 heavy chains (180 kD) and 3 light chains (34 and 36 kD), that forms the basketwork of triskelions around a coated vesicle. There are two genes for light chains, each of which can generate two distinct transcripts by tissue specific alternative splicing. (18 Nov 1997) |
| clathrin adaptor proteins | <cell biology> Family of proteins that bind to clathrin and promote its assembly into vesicle coats. Different adaptor proteins are associated with coated vesicles of Golgi or plasma membrane origin. (18 Nov 1997) |
| Clauberg | Karl W., German bacteriologist, *1893. See: Clauberg test, Clauberg unit. (05 Mar 2000) |
| Clauberg test | A test for progestational activity; immature rabbits are treated with 8 daily injections of oestrogen and then given 5 daily injections of the test substance; the amount required to produce definite progestational changes in the endometrium is taken as the unit; it is equivalent to 0.75 mg of progesterone. (05 Mar 2000) |
| Claude | Henri, French psychiatrist, 1869-1945. See: Claude's syndrome. (05 Mar 2000) |
| Claude's syndrome | <syndrome> Midbrain syndrome with oculomotor palsy on the side of the lesion and incoordination on the opposite side. (05 Mar 2000) |
| claudication | Origin: L. Claudicatio = limping or lameness. (18 Nov 1997) |
| claudicatory | Relating to claudication, especially intermittent claudication. (05 Mar 2000) |
| Claudius | Friedrich M., German anatomist, 1822-1869. See: Claudius' cells, Claudius' fossa. (05 Mar 2000) |
| Claudius' cells | Columnar cell's on the floor of the ductus cochlearis external to the organ of Corti. (05 Mar 2000) |