| Picrasma | See: quassia. Origin: L., fr. G. Pikrasmos, bitterness (05 Mar 2000) |
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| picrate | <chemistry> A salt of picric acid. Source: Websters Dictionary (01 Mar 1998) |
| picric | <chemistry> Pertaining to, or designating, a strong organic acid (called picric acid), intensely bitter. Picric acid is obtained by treating phenol with strong nitric acid, as a brilliant yellow crystalline substance, C6H2(NO2)3.OH. It is used in dyeing silk and wool, and also in the manufacture of explosives, as it is very unstable when heated. Synonym: trinitrophenol, and formerly carbazotic acid. Origin: Gr. Bitter. Source: Websters Dictionary (01 Mar 1998) |
| picric acid | C6H2(NO2)3OH; 2,4,6-Trinitrophenol;has been used as an application in burns, eczema, erysipelas, and pruritus. Synonym: carbazotic acid, nitroxanthic acid. Origin: G. Pikros, bitter (05 Mar 2000) |
| picrite | <chemical> A dark green igneous rock, consisting largely of chrysolite, with hornblende, augite, biotite, etc. Origin: From Gr. Bitter. Source: Websters Dictionary (01 Mar 1998) |
| picro-Mallory trichrome stain | <technique> A modification of Mallory's trichrome stain that involves the addition of picric acid. (05 Mar 2000) |
| picrocarmine | See: picrocarmine stain. (05 Mar 2000) |
| picrocarmine stain | <technique> A red crystalline powder derived from a solution of carmine, ammonia, and picric acid which is evaporated, leaving the powder (soluble in water); it produces excellent staining of keratohyaline granules. (05 Mar 2000) |
| picroformol | See: picroformol fixative. (05 Mar 2000) |
| picroformol fixative | A fixative containing formalin and picric acid. (05 Mar 2000) |
| picrolite | <chemical> A fibrous variety of serpentine. Origin: Gr. Bitter., cf. F. Picrolithe. Source: Websters Dictionary (01 Mar 1998) |
| picromel | <chemistry> A colourless viscous substance having a bitter-sweet taste. It was formerly supposed to be the essential principle of the bile, but is now known to be a mixture, principally of salts of glycocholic and taurocholic acids. Origin: Gr. Bitter + honey: cf. F. Picromel. Source: Websters Dictionary (01 Mar 1998) |
| picronigrosin | See: picronigrosin stain. (05 Mar 2000) |
| picronigrosin stain | <technique> A solution of nigrosin in picric acid, used for staining connective tissue. (05 Mar 2000) |
| picrotoxin | <chemistry> A bitter white crystalline substance found in the cocculus indicus. It is a peculiar poisonous neurotic and intoxicant, and consists of a mixture of several neutral substances. Origin: Gr. Bitter + toxic + -in. Source: Websters Dictionary (01 Mar 1998) |