| ret | <oncogene> A human oncogene, encoding a receptor tyrosine kinase. (18 Nov 1997) |
|---|---|
| retained menstruation | An accumulation of menstrual blood in the vagina. (12 Dec 1998) |
| retained placenta | Incomplete separation of the placenta and its failure to be expelled at the usual time after delivery of the child. Synonym: incarcerated placenta. (05 Mar 2000) |
| retainer | <dentistry> A gadget that the orthodontist gives you to wear after the orthodntist removes your braces. The retainer attaches to your upper teeth and holds them in the correct position. You wear the retainer at night to make sure that none of your teeth move while your jaw hardens and your teeth get strongly attached to your jaw. (08 Jan 1998) |
| retard | <pharmacology> Characterised by retarded action, said of a drug when it is supposed to exercise its maximum effect later in the cycle. (10 Mar 1998) |
| retardate | A mildly pejorative term, which is decreasing in usage, for a person who has mental retardation. Origin: L. Retardo, to delay, hinder (05 Mar 2000) |
| retardation | Delay, hindrance, delayed development. Origin: L. Retardare = to slow down, impede (18 Nov 1997) |
| retardation plate | <optics> A plate placed in the path of a beam of polarized light for the purpose of introducing a difference in phase. Usually a quarter-wave plate and a first-order red plate are furnished with a polarizing microscope. See: quartz wedge, compensator. (10 Mar 1998) |
| retarded dentition | Dentition in which growth phenomena such as calcification, elongation, and eruption occur later than in the average range of normal variation as a result of some systemic metabolic dysfunction (e.g., hypothyroidism). (05 Mar 2000) |
| retarder | An agent used to slow the chemical hardening of gypsum, resins, or impression materials used in dentistry. (05 Mar 2000) |
| retch | To make an involuntary effort to vomit. Origin: A.S. Hraecan, to hawk (05 Mar 2000) |
| retching | Gastric and oesophageal movements of vomiting without expulsion of vomitus. Synonym: dry vomiting, vomiturition. (05 Mar 2000) |
| rete | <anatomy> A net or network; a plexus; particularly, a network of blood vessels or nerves, or a part resembling a network. Origin: L, a net. Source: Websters Dictionary (01 Mar 1998) |
| rete acromiale | A vascular network between the acromion and the skin of the shoulder, formed by anastomoses of the acromial branch of the suprascapular artery with the acromial branch of the thoracoacromial artery. Synonym: rete acromiale, acromial plexus. (05 Mar 2000) |
| rete arteriosum | A vascular network formed by anastomoses between minute arteries just before they become capillaries. Synonym: rete arteriosum. (05 Mar 2000) |