| ochlesis | <medicine> A general morbid condition induced by the crowding together of many persons, especially. Sick persons, under one roof. Origin: NL, fr. Gr. Disturbance, fr. Crowd, mob. Source: Websters Dictionary (01 Mar 1998) |
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| ochlophobia | <psychology> Morbid fear of crowds. Origin: G. Ochlos, a crowd, + phobos, fear (05 Mar 2000) |
| Ochoa | Severo, Spanish-U.S. Biochemist and Nobel laureate, *1905. See: Ochoa's law. (05 Mar 2000) |
| Ochoa's law | The content of the X-chromosome tends to be phylogenetically conserved. (05 Mar 2000) |
| ochratoxin A hydroxylase | <enzyme> Catalyzed by the cytochrome p450ia1 isoenzyme Registry number: EC 1.14.99.- Synonym: ochratoxin 4-hydroxylase (26 Jun 1999) |
| ochratoxins | Toxins produced by aspergillus ochraceus. Occurring widely, ochratoxins have been found as natural contaminants on storage grains, corn, peanuts, cottonseed, and decaying vegetation. They are produced by several other species of aspergillus as well as by penicillium viridicatum. (12 Dec 1998) |
| ochre | <chemical> A impure earthy ore of iron or a ferruginous clay, usually red (hematite) or yellow (limonite), used as a pigment in making paints, etc. The name is also applied to clays of other colours. A metallic oxide occurring in earthy form; as, tungstic ocher or tungstite. Origin: F.ocre, L. Ochra, fr. Gr, from pale, pale yellow. <chemical> See Ocher. Source: Websters Dictionary (01 Mar 1998) |
| ochre codon | The codon UAA, one of the three that causes termination of protein synthesis. The most frequent termination codon in E. Coli genes. (18 Nov 1997) |
| ochre mutation | Mutation that changes any codon to the termination codon UAA. (18 Nov 1997) |
| ochre suppressor | A gene that codes for an altered tRNA so that its anticodon can recognise the ochre codon and thus allows the continuation of protein synthesis. A suppressor of an ochre mutation is a tRNA that is charged with the amino acid corresponding to the original codon or a neutral substitute. Ochre suppressors will also suppress amber codons. (18 Nov 1997) |
| ochrea | A sheath, formed from two stipules, encircling the node. (09 Oct 1997) |
| ochreated | 1. Wearing or furnished with an ochrea or legging; wearing boots; booted. "A scholar undertook..to address himself ochreated unto the vice chancellor." (Fuller) 2. <botany> Provided with ochrea, or sheathformed stipules, as the rhubarb, yellow dock, and knotgrass. Source: Websters Dictionary (01 Mar 1998) |
| ochrodermia | Yellow discoloration of the skin. Origin: G. Ochros, pale yellow, + derma, skin (05 Mar 2000) |
| ochrometer | An instrument for determining the capillary blood pressure; one of two adjacent fingers is compressed by a rubber balloon until blanching of the skin occurs, after which the force necessary to accomplish this colour change is read in millimeters of mercury. Origin: G. Ochros, pale yellow, + metron, measure (05 Mar 2000) |
| ochronosis | Deposition of dark brown pigment in cartilage, joint capsules and other tissues, usually as a result of alkaptonuria. (18 Nov 1997) |