| lumbricus | <zoology> A genus of annelids, belonging to the Oligochaeta, and including the common earthworms. See Earthworm. Origin: L. See Lumbric. Source: Websters Dictionary (01 Mar 1998) |
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| lumbrokinase | <enzyme> A group of 6 fibrinolytic enzymes isolated from extracts of korean earthworm, lumbricus rubellus Pharmacological action: fibrinolytic agents Registry number: EC 3.4.99.- (26 Jun 1999) |
| lumbus | Synonym: loin. Origin: L. (05 Mar 2000) |
| lumen | <anatomy> The cavity or channel within a tube or tubular organ. (18 Nov 1997) |
| lumican | Isoform (37 kD) of corneal keratan sulphate proteoglycan also found in arterial wall and many other tissues. (18 Nov 1997) |
| lumichrome | 7,8-Dimethylalloxazine;riboflavin minus its ribityl side chain; produced by ultraviolet irradiation of riboflavin in acid solution. (05 Mar 2000) |
| lumicolchicine | <drug> A derivative of colchicine produced by exposure to ultraviolet light and that does not inhibit tubulin polymerisation, although it has many of the non-specific effects of colchicine. (18 Nov 1997) |
| lumicolchicines | N-(5,6,7,7b,8,10a-hexahydro-1,2,3,9-tetramethoxy- 8-oxobenzo(a) cyclopenta(3,4)cyclobuta(1,2-c)cyclopenten- 7-ylacetamide. Three, alpha, beta, and gamma isomers of ultraviolet degradation products of colchicine that lack many of the physiological actions of the parent; used as experimental control for colchicine actions. (12 Dec 1998) |
| lumiflavin | 7,8,10-Trimethylisoalloxazine;a yellow photoderivative of riboflavin, bearing a methyl group in place of the ribityl; produced by ultraviolet irradiation of riboflavin in alkaline solution. (05 Mar 2000) |
| lumina | Plural of lumen. Origin: L. (05 Mar 2000) |
| luminal | Relating to the lumen of a blood vessel or other tubular structure. (05 Mar 2000) |
| luminance | The brightness of an object, expressed as the luminous flux per unit solid angle per unit projected area, measured in lamberts or in candelas per square meter. Origin: L. Lumino, to light up, fr. Lumen, light (05 Mar 2000) |
| luminescence | Production of light. (09 Oct 1997) |
| luminescence, bacterial | The emission of light by bacteria. It is applied to studies on bacterial viability, metabolism, genetics, adhesiveness, and other physiological properties. (12 Dec 1998) |
| luminescent proteins | Proteins which are involved in the phenomenon of light emission in living systems. Included are the "enzymatic" and "non-enzymatic" types of system with or without the presence of oxygen or co-factors. (12 Dec 1998) |