| procaryotic | Pertaining to or characteristic of a prokaryote. Synonym: procaryotic. (05 Mar 2000) |
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| procatarctic | <medicine> Beginning; predisposing; exciting; initial. The words procatarctic causes have been used with different significations. Thus they have been employed synonymously with prime causes, exciting causes, and predisposing or remote causes. "The physician inquires into the procatarctic causes." (Harvey) Origin: Gr. Beginning beforehand. Fr. To begin first; before + to begin; intens. + to begin: cf. F. Procatarctique. Source: Websters Dictionary (01 Mar 1998) |
| procatarxis | <medicine> The kindling of a disease into action; also, the procatarctic cause. Origin: NL, fr. Gr. First beginning. Source: Websters Dictionary (01 Mar 1998) |
| procaterol | <chemical> A long-acting beta-2-adrenergic receptor agonist. It is a potent bronchodilator that may be administered orally or by aerosol inhalation. Pharmacological action: adrenergic beta-agonists, bronchodilator agents, sympathomimetic. Chemical name: 2(1H)-Quinolinone, 8-hydroxy-5-(1-hydroxy-2-((1-methylethyl)amino)butyl)-, (R*,S*)-(+-)- (12 Dec 1998) |
| procedure | A series of steps by which a desired result is accomplished. Origin: L. Procedere, from pro = forward, cedere = move (18 Nov 1997) |
| procelia | A lateral ventricle of the brain; the hollow of the prosencephalon. Origin: pro-+ G. Koilia, a hollow (05 Mar 2000) |
| procellarian | <ornithology> One of a family of oceanic birds (Procellaridae) including the petrels, fulmars, and shearwaters. They are often seen in great abundance in stormy weather. Origin: L. Procella a storm. Source: Websters Dictionary (01 Mar 1998) |
| procelous | Concave anteriorly. Origin: pro-+ G. Koilos, hollow (05 Mar 2000) |
| procentriole | <cell biology> The forming centriole composed of microtubules. Multiple procentrioles are present in some cells as a structure called the blepharoplast. (18 Nov 1997) |
| procentriole organiser | Dense spherical fibrous granules that occur in the centrosphere and act in the development of centrioles or basal bodies. Synonym: procentriole organiser. (05 Mar 2000) |
| procephalic | <zoology> Pertaining to, or forming, the front of the head. <zoology> Procephalic lobe, that part of the head of an invertebrate animal which is in front of the mouth. Origin: Pref. Pro- + cephalic. Source: Websters Dictionary (01 Mar 1998) |
| procercoid | The first stage in the aquatic life cycle of certain tapeworms, such as the pseudophyllideans (family Diphyllobothriidae), following ingestion of the newly hatched larva (coracidium) by a copepod (water flea). The procercoid develops into a tailed larva in the body cavity of the crustacean first intermediate host; when the procercoid and its host are ingested by a fish, the procercoid enters the new host's tissues and becomes a plerocercoid. See: Diphyllobothrium latum, Pseudophyllidea. Origin: pro-+ G. Kerkos, tail, + eidos, resemblance (05 Mar 2000) |
| procerebrum | <anatomy> The prosencephalon. Origin: Pref. Pro- + cerebrum. Source: Websters Dictionary (01 Mar 1998) |
| proceres | <ornithology> An order of large birds; the Ratitae. Synonym: Proceri. Origin: NL, fr. L. Procer chief. Source: Websters Dictionary (01 Mar 1998) |
| procerite | <zoology> The segment next to the flagellum of the antennae of Crustacea. Origin: Pref. Pro- + Gr. Horn. Source: Websters Dictionary (01 Mar 1998) |