| acefylline piperazine | Piperazine theophylline-7-acetate;a diuretic and smooth muscle relaxant. (05 Mar 2000) |
|---|---|
| acellular | <microbiology> Describes any organism or tissue that is a mass of protoplasm which is not divided into cells, such as the plasmodium of some slime molds and the hyphae of some fungi. (12 Mar 1998) |
| acellular vaccine | <immunology, pharmacology, virology> Vaccine consisting of antigenic parts of cells. (13 Nov 1997) |
| acelom | Absence of a true celom or body cavity lined with mesothelium; typically found in Platyhelminthes (flatworms), which have a syncytial mass of parenchymal cells instead of a true body cavity. Origin: G. A-priv. + koiloma, hollow (celom) (05 Mar 2000) |
| acelomate | Not having a celom or body cavity. (05 Mar 2000) |
| acelomatous | Not having a celom or body cavity. (05 Mar 2000) |
| acenaphthene | <chemistry> Tricyclic ethylene-bridged naphthalene derivatives. They are found in petroleum residues and coal tar and used as dye intermediates, in the manufacture of plastics, and in insecticide and fungicides. (12 Dec 1998) |
| acenesthesia | Absence of the normal sensation of physical existence, or of the consciousness of visceral functioning. Origin: G. A-priv. + koinos, common, + aisthesis, feeling (05 Mar 2000) |
| acenocoumarin | <chemical> A coumarin that is used as an anticoagulant. Its actions and uses are similar to those of warfarin. Pharmacological action: anticoagulant. Chemical name: 2H-1-Benzopyran-2-one, 4-hydroxy-3-(1-(4-nitrophenyl)-3-oxobutyl)- (12 Dec 1998) |
| acenocoumarol | <chemical> A coumarin that is used as an anticoagulant. Its actions and uses are similar to those of warfarin. Pharmacological action: anticoagulant. Chemical name: 2H-1-Benzopyran-2-one, 4-hydroxy-3-(1-(4-nitrophenyl)-3-oxobutyl)- (12 Dec 1998) |
| acentric | <cell biology> This term refers to a chromosome or chromatid that lacks a centromere. This condition can result during crossing over in which the normal, centromere-containing segement is replaced by an inverted segment that lacks a centromere. (12 Mar 1998) |
| acentric chromosome | A fragment of a chromosome lacking a centromere and unable to attach to the mitotic spindle, therefore unable to take part in the division of a nucleus and randomly distributed in daughter cells. Synonym: acentric fragment. (05 Mar 2000) |
| acentric fragment | A fragment of a chromosome lacking a centromere and unable to attach to the mitotic spindle, therefore unable to take part in the division of a nucleus and randomly distributed in daughter cells. Synonym: acentric fragment. (05 Mar 2000) |
| acephal | <zoology> One of the Acephala. Origin: Gr.; priv. + head: cf. F. Acephale, LL. Acephalus. Source: Websters Dictionary (01 Mar 1998) |
| acephala | <zoology> That division of the Mollusca which includes the bivalve shells, like the clams and oysters; so called because they have no evident head. Formerly the group included the Tunicata, Brachiopoda, and sometimes the Bryozoa. See Mollusca. Origin: NL, fr. Gr, adj. Neut. Pl, headless. See Acephal. Source: Websters Dictionary (01 Mar 1998) |