| prechordal plate | A small area immediately rostral to the cephalic tip of the notochord where ectoderm and endoderm are in contact; when turned under the growing head, it forms the pharyngeal membrane. See: oral plate. Synonym: prechordal plate. (05 Mar 2000) |
|---|---|
| prechroming | Treatment of a tissue or fabric first with a metal mordant, followed by a dye. (05 Mar 2000) |
| precinct | 1. The limit or exterior line encompassing a place; a boundary; a confine; limit of jurisdiction or authority; often in the plural; as, the precincts of a state. "The precincts of light." 2. A district within certain boundaries; a minor territorial or jurisdictional division; as, an election precinct; a school precinct. 3. A parish or prescribed territory attached to a church, and taxed for its support. "The parish, or precinct, shall proceed to a new choice." (Laws of Massachusetts) Origin: LL. Praecinctum, fr. L. Praecingere, praecinctum, to gird about, to encompass; prae = before + cingere to gird, surround. See Pre-, and Cincture. Source: Websters Dictionary (01 Mar 1998) |
| precipice | 1. A sudden or headlong fall. 2. A headlong steep; a very steep, perpendicular, or overhanging place; an abrupt declivity; a cliff. "Where wealth like fruit on precipices grew." (Dryden) Origin: F. Precipice, L. Praecipitium, fr. Praeceps, -cipitis, headlong; prae = before + caput, capitis, the head. See Pre-, and Chief. Source: Websters Dictionary (01 Mar 1998) |
| precipitable | Capable of being precipitated, or cast to the bottom, as a substance in solution. <chemistry> See Precipitate, Source: Websters Dictionary (01 Mar 1998) |
| precipitant | <chemistry> Any force or reagent which causes the formation of a precipitate. Source: Websters Dictionary (01 Mar 1998) |
| precipitate | <chemistry> To cause a solid to settle out of a solution. The solid that settles out of a solution. To be deposited out of a solution. (09 Oct 1997) |
| precipitate labour | Very rapid labour ending in delivery of the foetus. (05 Mar 2000) |
| precipitated calcium carbonate | CaCO3;used as an antacid in the management of peptic ulcers and other conditions of gastric hyperacidity. (05 Mar 2000) |
| precipitated sulfur | Sublimed sulfur boiled with lime water, the lime being removed from the precipitate by washing with diluted hydrochloric acid; used in preparing sulfur ointment and in the treatment of various skin disorders. Synonym: lac sulfuris, milk of sulfur. (05 Mar 2000) |
| precipitating antibody | <protein> Any antibody that forms a precipitating complex (a precipitin line) with an appropriate multivalent antigen. The term is now outmoded. (18 Nov 1997) |
| precipitating cause | A factor that brings on the onset of manifestations of a disease process. (05 Mar 2000) |
| precipitating factors | Factors associated with the definitive onset of a disease, illness, accident, behavioural response, or course of action. Usually one factor is more important or more obviously recognizable than others, if several are involved, and one may often be regarded as "necessary". Examples include exposure to specific disease; amount or level of an infectious organism, drug, or noxious agent, etc. (12 Dec 1998) |
| precipitation | The act or process of precipitating. Origin: L. Praecipitatio (18 Nov 1997) |
| precipitation curve | A graph of the quantity of precipitate formed as a function of the quantity of antigen added during the titration of an antibody with an antigen. Synonym: Heidelberger curve. (05 Mar 2000) |
Synonyms : Cortex, Prefrontal
Synonyms :
Synonyms :
Synonyms :
Synonyms : Pregnancies
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| premature labor |
labor beginning prior to the 37th week of gestation
Ãâó: wordnet.princeton.edu/perl/webwn
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| premature ventricular contraction |
irregularity of cardiac rhythm; recurrent occurrences can be a precursor of ventricular fibrillation
Ãâó: wordnet.princeton.edu/perl/webwn
|
| prematurity |
prematureness: the state of being premature
Ãâó: wordnet.princeton.edu/perl/webwn
|
| premenstrual |
of or relating to or occurring during the period just before menstruation
Ãâó: wordnet.princeton.edu/perl/webwn
|
| precipitin |
an antibody that causes precipitation when it unites with its antigen
Ãâó: wordnet.princeton.edu/perl/webwn
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| PRE | receives blood from the head and arms and chest and empties into the right atrium of the heart |
|---|---|
| PRE | move ahead (of others) in time or space |
| PRE | be the predecessor of |
| PRE | come before |
| PRE | be earlier in time |
| PRE | the act of preceding (as in a ceremony) |
| PRE | preceding in time |
| PRE | status established in order of importance or urgency |
| PRE | the act of preceding (as in a ceremony) |
| PRE | preceding in time |
| PRE | status established in order of importance or urgency |
| PRE | an example that is used to justify similar occurrences at a later time |
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