| unilocular fat | Adipose tissue in which the fat is present in a single droplet within the fat cells. Synonym: white fat. (05 Mar 2000) |
|---|---|
| unilocular hydatid cyst | The commonest form of hydatid cyst in man, caused by Echinococcus granulosus and found in the liver, lungs, or any other site where the hexacanth embryo may settle if it passes the hepatic or pulmonary capillary filters; characterised by large balloon-like forms lined internally with a germinative membrane, enclosed externally in a laminated membrane within a host-parasite capsule, and filled with fluid (hydatid fluid) and infectious scoleces of the young tapeworms (hydatid sand). (05 Mar 2000) |
| unilocular joint | One in which an intra-articular disk is incomplete or absent, the joint having but a single cavity. (05 Mar 2000) |
| unimolecular | Denoting a single molecule. Synonym: monomolecular. (05 Mar 2000) |
| unimolecular reaction | A reaction involving a single molecule (e.g., decomposition, intramolecular rearrangement, intramolecular oxidation or reduction), even if a catalytic agent, such as acid or alkali, is present in large excess, on a molecular basis, or is not rate-determining; such reaction's are usually first-order reaction's. Compare: molecularity. Synonym: unimolecular reaction. (05 Mar 2000) |
| unimolecular step | <chemistry> A reaction involving one species (09 Jan 1998) |
| unimuscular | <zoology> Having only one adductor muscle, and one muscular impression on each valve, as the oyster; monomyarian. Origin: Uni- muscular. Source: Websters Dictionary (01 Mar 1998) |
| uninducible mutant | A mutant that cannot be induced. (05 Mar 2000) |
| unineme hypothesis | <cell biology, molecular biology> This states that that a chromatid has only one DNA duplex, which goes from one end of the chromatid to the other. (09 Oct 1997) |
| unineme theory | <cell biology> Theory that proposes that each chromosome (before S phase) consists of a single strand of DNA. Now generally accepted and being noncontroversial the term has fallen into disuse. (18 Nov 1997) |
| uninhibited neurogenic bladder | A condition, either congenital or acquired, of abnormal bladder function whereby normal inhibitory control of detrusor function by the central nervous system is impaired or underdeveloped, resulting in precipitant or uncontrolled micturition and/or anuresis. (05 Mar 2000) |
| uninterrupted suture | An uninterrupted series of stitches using one suture; the stitching is fastened at each end by a knot. Synonym: spiral suture, uninterrupted suture. (05 Mar 2000) |
| uninuclear | Uninucleate Having but one nucleus. Compare: mononuclear. (05 Mar 2000) |
| uninucleated | <biology> Possessed of but a single nucleus; as, a uninucleated cell. Origin: Uni- + nucleated. Source: Websters Dictionary (01 Mar 1998) |
| unio | <zoology> Any one of numerous species of fresh water mussels belonging to Unio and many allied genera. Origin: NL, fr. L. Unio unity, union, a single large pearl. See Union. Source: Websters Dictionary (01 Mar 1998) |