| 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) |
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| 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) |
| ochronotic | Relating to or characterised by ochronosis. (05 Mar 2000) |
| ochronotic arthritis | Osteoarthritis occurring as a complication of ochronosis. (05 Mar 2000) |
| Ochsner | Albert J., U.S. Surgeon, 1858-1925. See: Ochsner clamp, Ochsner's method. (05 Mar 2000) |
| Ochsner clamp | A straight haemostat with teeth. (05 Mar 2000) |
| Ochsner's method | An obsolete treatment for appendicitis (by peristaltic rest), when surgery is not advisable. (05 Mar 2000) |
| OCP | Oral contraceptive pill. Also known as the pill. (12 Dec 1998) |