| condition | A mode or state of being, the state of being fit: the physical status of the body as a whole or of one of its parts usually used to indicate abnormality. (18 Nov 1997) |
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| conditional mutation | <molecular biology> A mutation that is only expressed under certain environmental conditions for example temperature sensitive mutants. (05 Jan 1998) |
| conditional probability | A probability quoted when the range of choices admitted is restricted, i.e., conditional; thus, the probability of the child of a colour-blind man inheriting the gene is 1/2 if the child is female and almost zero if the child is male. (05 Mar 2000) |
| conditional use permit | A permit, with conditions, allowing an approved use on a site outside the appropriate zoning class. (05 Dec 1998) |
| conditional-lethal mutant | A viral mutant that can replicate under some (permissive) conditions but not under other (restrictive or nonpermissive) conditions, the parent (wild type) strain being able to replicate under both conditions. See: suppressor-sensitive mutant, temperature-sensitive mutant. Synonym: conditional-lethal mutant. (05 Mar 2000) |
| conditionally lethal mutant | A viral mutant that can replicate under some (permissive) conditions but not under other (restrictive or nonpermissive) conditions, the parent (wild type) strain being able to replicate under both conditions. See: suppressor-sensitive mutant, temperature-sensitive mutant. Synonym: conditional-lethal mutant. (05 Mar 2000) |
| conditioned haemolysis | Haemolysis caused by complement when erythrocytes have been sensitised by specific complement-fixing antibody. Synonym: conditioned haemolysis. (05 Mar 2000) |
| conditioned medium | <cell biology> Cell culture medium that has already been partially used by cells. Although depleted of some components, it is enriched with cell derived material, probably including small amounts of growth factors, such cell conditioned medium will support the growth of cells at much lower density and, mixed with some fresh medium, is therefore useful in cloning. (18 Nov 1997) |
| conditioned reflex | A reflex that is gradually developed by training and association through the frequent repetition of a definite stimulus. See: conditioning. Synonym: acquired reflex, behaviour reflex, trained reflex. (05 Mar 2000) |
| conditioned response | A response already in an individual's repertoire but which, through repeated pairings with its natural stimulus, has been acquired or conditioned anew to a previously neutral or conditioned stimulus. See: conditioning. Compare: unconditioned response. (05 Mar 2000) |
| conditioned stimulus | A stimulus applied to one of the sense organs (e.g., receptors of vision, hearing, touch) which are an essential and integral part of the neural mechanism underlying a conditioned reflex. See: classical conditioning, higher order conditioning. (05 Mar 2000) |
| conditioning | 1. <psychology> A general term referring to the learning of some particular response. 2. <oncology> A preparative regimen of chemotherapy before a bone marrow transplant. (03 Jul 1999) |
| conditioning therapy | The application of modern theories of learning and conditioning in the treatment of behaviour disorders. (12 Dec 1998) |
| conditioning, eyelid | Reflex closure of the eyelid occurring as a result of classical conditioning. (12 Dec 1998) |
| conditioning, operant | Learning situations in which the sequence responses of the subject are instrumental in producing reinforcement. When the correct response occurs, which involves the selection from among a repertoire of responses, the subject is immediately reinforced. (12 Dec 1998) |
| runner's condition | <orthopaedics> A condition where the knee cap (patella) rubs on the surface of the femur rather than following its normal tracking over the knee joint. This condition is brought about by stress or overuse (for example runners). Running on hills or incline surfaces can exacerbate this problem. Symptoms include knee pain, just under the knee cap after running, progressing to knee pain at rest. Treatment includes rest and stretching exercises for the quadriceps and hamstring muscles. Strengthening the medial (inner) head of the quadriceps (along the inner thigh) will help pull the knee cap medially and correct the problem. (17 Dec 1997) |
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| sine condition | <microscopy> The design of a lens must fulfill this condition, described by Abbe, if the image is to be aplanatic. It states that the ratio of the sines of the angles of the incident and refracted rays to the axis must be constant, this constant is equal to the inverse of the magnification of the image. (05 Aug 1998) |
| stoichiometric condition | That condition at which the proportion of the air-to-fuel is such that all combustible products will be completely burned with no oxygen remaining in the combustion air. (05 Dec 1998) |
| desired future condition | A vision of the desired future state of a specific area. A description of land and resource conditions expected to result if management goals and objectives are achieved. (05 Dec 1998) |
| disturbed condition | <ecology> Refers to areas in which indicators of one or more characteristics (vegetation, soil and/or hydrology) have been sufficiently altered by man's activities or natural events so as to make it more difficult to recognise whether or not the wetland identification criteria are met. (11 Jan 1998) |
| fibrocystic condition of the breast | A benign disease common in women of the third, fourth, and fifth decades characterised by formation, in one or both breasts, of small cysts containing fluid which may appear as blue dome cysts; associated with stromal fibrosis and with variable degrees of intraductal epithelial hyperplasia and sclerosing adenosis. Synonym: cystic hyperplasia of the breast. (05 Mar 2000) |