| retrogression | 1. The act of retrograding, or going backward; retrogradation. 2. <biology> Backward development; a passing from a higher to a lower state of organization or structure, as when an animal, approaching maturity, becomes less highly organised than would be expected from its earlier stages or known relationship. Synonym: retrograde development, and regressive metamorphism. Origin: Cf. F. Retrogression. See Retrograde, and cf. Digression. Source: Websters Dictionary (01 Mar 1998) |
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| retrogressive | 1. Tending to retrograde; going or moving backward; declining from a better to a worse state. 2. <biology> Passing from a higher to a lower condition; declining from a more perfect state of organization; regressive. Origin: Cf. F. Retrogressif. Source: Websters Dictionary (01 Mar 1998) |
| retrohyoid bursa | <anatomy> A bursa between the posterior surface of the body of the hyoid bone and the thyrohyoid membrane. Synonym: bursa retrohyoidea, Boyer's bursa, bursa of hyoid, subhyoid bursa. (05 Mar 2000) |
| retroiliac ureter | Congenital defect where the ureter passes deep to the iliac artery. (05 Mar 2000) |
| retroinguinal space | A triangular space between the peritoneum and the transversalis fascia, at the lower angle of which is the inguinal ligament; it contains the lower portion of the external iliac artery. Synonym: Bogros' space, spatium retroinguinale. (05 Mar 2000) |
| retroinhibition | <biochemistry, physiology> The process of the end product of a particular metabolic reaction inhibiting an allosteric enzyme involved in that reaction as the reaction starts again, thus breaking the reaction cycle. (09 Oct 1997) |
| retroiridian | Posterior to the iris. (05 Mar 2000) |
| retrojection | The washing out of a cavity by the backward flow of an injected fluid. Origin: L. Retro, backward, + jacio, to throw (05 Mar 2000) |
| retrojector | A form of syringe with long tubular attachment to the nozzle, used in retrojection. (05 Mar 2000) |
| retrolental | Posterior to the lens of the eye. Synonym: retrolenticular. (05 Mar 2000) |
| retrolental fibroplasia | <ophthalmology, paediatrics> A bilateral retinopathy occurring in premature infants treated with excessively high concentrations of oxygen, characterised by vascular dilatation, proliferation, and tortuosity, oedema, and retinal detachment, with ultimate conversion of the retina into a fibrous mass that can be seen as a dense retrolental membrane. Usually growth of the eye is arrested and may result in microophthalmia, and blindness may occur. (03 Jul 1999) |
| retrolenticular | Synonym: retrolental. 2. Behind the lentiform nucleus of the brain. (05 Mar 2000) |
| retrolenticular limb of internal capsule | That portion of the capsule caudal to the lentiform nucleus which contains large parts of the optic or geniculocalcarine radiation and other fibre systems. Synonym: pars retrolentiformis capsulae internae, retrolenticular limb of internal capsule. (05 Mar 2000) |
| retrolenticular part of internal capsule | That portion of the capsule caudal to the lentiform nucleus which contains large parts of the optic or geniculocalcarine radiation and other fibre systems. Synonym: pars retrolentiformis capsulae internae, retrolenticular limb of internal capsule. (05 Mar 2000) |
| retrolingual | Relating to the back part of the tongue; posterior to the tongue. Origin: retro-+ L. Lingua, tongue (05 Mar 2000) |