| pentaquine | 8-(5-Iso-propylamino)-6-methoxyquinoline;an antimalarial agent closely related chemically to pamaquine but less toxic and more effective; it is administered with quinine, the two drugs acting synergically; active against Plasmodium vivax infections. (05 Mar 2000) |
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| pentaspermous | <botany> Containing five seeds. Origin: Penta- + Gr. Seed. Source: Websters Dictionary (01 Mar 1998) |
| pentastichous | <botany> Having, or arranged in, five vertical ranks, as the leaves of an apple tree or a cherry tree. Origin: Penta- + Gr. A row. Source: Websters Dictionary (01 Mar 1998) |
| Pentastoma | Older name for a genus of Pentastomida, now called Linguatula. The species described as Pentastoma denticulatum proved to be the larva of Linguatula rhinaria, sometimes parasitic in the nose of humans and other mammals; adults are found in the lungs of reptiles. Origin: penta-+ G. Stoma, mouth (05 Mar 2000) |
| pentastomiasis | Infection of herbivorous animals, swine, and man with larval tongue worms; lesions occur principally in the lymph nodes of the digestive tract, where they often resemble those of tuberculosis. (05 Mar 2000) |
| pentastomida | <zoology> Same as Linguatulina. Origin: NL, fr. (see Penta-) + a mouth. Source: Websters Dictionary (01 Mar 1998) |
| pentathionic | <chemistry> Pertaining to, or designating, an acid of sulphur obtained by leading hydrogen sulphide into a solution of sulphur dioxide; so called because it contains five atoms of sulphur. Origin: Penta- + thionic. Source: Websters Dictionary (01 Mar 1998) |
| pentatomic | <chemistry> Having five atoms in the molecule. Having five hydrogen atoms capable of substitution. Origin: Penta- + atomic. Source: Websters Dictionary (01 Mar 1998) |
| Pentatrichomonas | A genus of parasitic protozoan flagellates, formerly part of the genus Trichomonas but now separated as a distinct genus by the presence of five anterior flagella and a granular parabasal body. The species Pentatrichomonas hominis lives as a commensal in the colon of man and other primates, dogs, cats, oxen, and various rodents. Origin: penta-+ Trichomonas (05 Mar 2000) |
| pentavalent | <chemistry> Having a valence of five; said of certain atoms and radicals. Origin: Penta- + L. Valens, p. Pr. See Valence. Source: Websters Dictionary (01 Mar 1998) |
| pentavalent gas gangrene antitoxin | Antitoxin specific for the toxin of one or more species of Clostridium that cause gaseous gangrene and associated toxaemia, especially C. Perfringens C. Novyi, C. Histolyticum, and commercially available preparations are usually polyvalent, i.e., contain antitoxin for two or more species. Synonym: pentavalent gas gangrene antitoxin. (05 Mar 2000) |
| pentazocine | <chemical> The first mixed agonist-antagonist analgesic to be marketed. It is an agonist at the kappa and sigma opioid receptors and has a weak antagonist action at the mu receptor. Pharmacological action: analgesics, opioid, anaesthesia adjuvants, narcotic antagonists, narcotics. Chemical name: 2,6-Methano-3-benzazocin-8-ol, 1,2,3,4,5,6-hexahydro-6,11-dimethyl-3-(3-methyl-2-butenyl)-, (2alpha,6alpha,11R*)- (12 Dec 1998) |
| pentecost | 1. A solemn festival of the Jews; so called because celebrated on the fiftieth day (seven weeks) after the second day of the Passover (which fell on the sixteenth of the Jewish month Nisan); hence called, also, the Feast of Weeks. at this festival an offering of the first fruits of the harvest was made. By the Jews it was generally regarded as commemorative of the gift of the law on the fiftieth day after the departure from Egypt. 2. A festival of the Roman Catholic and other churches in commemoration of the descent of the Holy Spirit on the apostles; which occurred on the day of Pentecost; called also Whitsunday. Origin: L. Pentecoste, Gr. (sc) the fiftieth day, Pentecost, fr. Fiftieth, fr. Fifty, fr. Five. See Five, and cf. Pingster. Source: Websters Dictionary (01 Mar 1998) |
| pentecoster | An officer in the Spartan army commanding fifty men. Origin: NL, fr. Gr, fr. Fifty. Source: Websters Dictionary (01 Mar 1998) |
| pentene | <chemistry> Same as Amylene. See: Penta-. Source: Websters Dictionary (01 Mar 1998) |
| penicillin G potassium |
a salt of penicillin G, administered orally and by intravenous injection or infusion.
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| penicillin G procaine |
a salt having a long-sustained action, obtained by combining penicillin G with procaine (1:1); administered intramuscularly.
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| penicillin G sodium |
[USP] a salt having a potency of 1500?750 U per mg; administered intramuscularly and intravenously.
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| penicillin V benzathine |
[USP] the benzathine salt of penicillin V, administered orally.
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| penicillin-fast |
(pen
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| PEN | poker played for small stakes |
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| PEN | a business deal on a trivial scale |
| PEN | poker played for small stakes |
| PEN | an arcade with coin-operated devices for entertainment |
| PEN | a child's coin bank (often shaped like a pig) |
| PEN | a melodramatic paperback novel |
| PEN | foetid Eurasian weed having round flat pods |
| PEN | someone who is excessively careful with money (who pinches every penny before letting go of it) |
| PEN | a stock selling for less that $1/share |
| PEN | spend money frugally |
| PEN | extreme care in spending money |
| PEN | giving or spending with reluctance |