| promanation | The act of flowing forth; emanation; efflux. Origin: Pref. Pro- + L. Manatio a flowing, fr. Manare to flow. Source: Websters Dictionary (01 Mar 1998) |
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| promastigote | Term now generally used instead of "leptomonad" or "leptomonad stage," to avoid confusion with the flagellate genus Leptomonas. It denotes the flagellate stage of a trypanosomatid protozoan in which the flagellum arises from a kinetoplast in front of the nucleus and emerges from the anterior end of the organism; usually an extracellular phase, as in the insect intermediate host (or in culture) of Leishmania parasites. Origin: pro-+ G. Mastix, whip (05 Mar 2000) |
| promazine | <chemical> A phenothiazine with actions similar to chlorpromazine but with less antipsychotic activity. It is primarily used in short-term treatment of disturbed behaviour and as an antiemetic. Pharmacological action: antiemetics, antipsychotic agents, phenothiazine, dopamine antagonists. Chemical name: 10H-Phenothiazine-10-propanamine, N,N-dimethyl- (12 Dec 1998) |
| promazine hydrochloride | 10-(3-Dimethylaminopropyl)phenothiazine hydrochloride;a phenothiazine tranquillising agent with actions and uses similar to those of chlorpromazine. (05 Mar 2000) |
| promedol | <chemical> 1,2,5-trimethyl-4-phenyl-4-piperidinol propionate. A narcotic analgesic similar to meperidine; it exists in four stereoisomers, two of which, the beta (isopromedol) and the gamma (trimeperidine) are active. Pharmacological action: analgesics, opioid, narcotics. Chemical name: 4-Piperidinol, 1,2,5-trimethyl-4-phenyl-, propanoate (ester) (12 Dec 1998) |
| promegaloblast | The earliest of four maturation stages of the megaloblast. See: erythroblast. Synonym: pernicious anaemia type rubriblast. (05 Mar 2000) |
| promegestone | <chemical> (17 beta)-17-methyl-17-(1-oxopropyl)estra-4,9-dien-3-one. A synthetic progestin which is useful for the study of progestin distribution and progestin tissue receptors, as it is not bound by transcortin and binds to progesterone receptors with a higher association constant than progesterone. Pharmacological action: progestational hormones, synthetic. Chemical name: Estra-4,9-dien-3-one, 17-methyl-17-(1-oxopropyl)-, (17beta)- (12 Dec 1998) |
| promerops | <ornithology> Any one of several species of very brilliant birds belonging to Promerops, Epimarchus, and allied genera, closely related to the paradise birds, and mostly native of new Guinea. They have a long curved beak and a long graduated tail. Origin: NL, fr. Gr. Before + bee-eater. Source: Websters Dictionary (01 Mar 1998) |
| promerphological | <biology> Relating to promorphology; as, a promorphological conception. Source: Websters Dictionary (01 Mar 1998) |
| prometaphase | <cell biology> Rarely used term that designates an extra stage in mitosis, starting with the breakdown of the nuclear envelope. Usually lumped in with metaphase. (18 Nov 1997) |
| prometaphase banding | Banding done in the stage of mitosis intermediate between prophase and metaphase. (05 Mar 2000) |
| promethazine | <chemical> A phenothiazine derivative with histamine h1-blocking, antimuscarinic, and sedative properties. It is used as an antiallergic, in pruritus, for motion sickness and sedation, and also in animals. Pharmacological action: anti-allergic agents, antiemetics, antipruritics, histamine h1 antagonists, sedatives, nonbarbiturate. Chemical name: 10H-Phenothiazine-10-ethanamine, N,N,alpha-trimethyl- (12 Dec 1998) |
| promethazine hydrochloride | 10-(2-Dimethylaminopropyl)phenothiazine hydrochloride;an antihistaminic with antiemetic properties. (05 Mar 2000) |
| promethazine theoclate | Promethiazine salt of 8-chlorotheophylline; an antihistaminic drug used for motion sickness. (05 Mar 2000) |
| promethea | <zoology> A large American bombycid moth (Callosamia promethea). Its larva feeds on the sassafras, wild cherry, and other trees, and suspends its cocoon from a branch by a silken band. Origin: NL. See Prometheus. Source: Websters Dictionary (01 Mar 1998) |