Lexic.us

Definition of Orcin

1. n. A colorless crystalline substance, C₆H₃.CH₃.(OH)₂, which is obtained from certain lichens (Roccella, Lecanora, etc.), also from extract of aloes, and artificially from certain derivatives of toluene. It changes readily into orcein.

Definition of Orcin

1. Noun. (organic compound) The organic compound 3,5-dihydroxytoluene, found in many lichens and synthesizable from toluene. ¹

¹ Source: wiktionary.com

Definition of Orcin

1. orcinol [n -S] - See also: orcinol

Medical Definition of Orcin

1. A colourless crystalline substance, C6H3.CH3.(OH)2, which is obtained from certain lichens (Roccella, Lecanora, etc), also from extract of aloes, and artificially from certain derivatives of toluene. It changes readily into orcein. Origin: Etymology uncertain: cf. F. Orcine. Source: Websters Dictionary (01 Mar 1998)

Lexicographical Neighbors of Orcin

Literary usage of Orcin

Below you will find example usage of this term as found in modern and/or classical literature:

1. A Dictionary of Chemistry and the Allied Branches of Other Sciences by Henry Watts (1871)
"A pound of aloes thus treated yields from 9 to 11 grammes of orcin. (Ill asi we tz and Berth, Ann. Ch. Fharm. cxxxiv. 287.) Preparation.—1. ..."

2. Hand-book of Chemistry by Leopold Gmelin, Henry Watts (1866)
"... soluble in water and alcohol ; the latter body becomes coloured with ammonia, like orcin, but does not form crystals. Stearate of orcin is insoluble in ..."

3. A Manual of Elementary Chemistry, Theoretical and Practical by George Fownes (1873)
"To obtain the orcin, the excess of baryta is precipitated from the liquid ... When ammonia is added to a solution of orcin. and the whole is exposed to (he ..."

4. Elements of Chemistry: Theoretical and Practical by William Allen Miller (1867)
"orcin is also obtained by simply heating ... water precipitates the acid from it in a gelatinous form. It forms a white insoluble barium salt. (1530) orcin ..."

5. Plant Analysis: Qualitative and Quantitative by Georg Dragendorff, Henry George Greenish (1884)
"orcin and beta- orcin, which have already been mentioned ... By the action of ammonia and air orcin yields a blue colouring matter, whilst, under the same ..."

6. A Manual of clinical diagnosis by means of laboratory methods, for students by Charles Edmund Simon (1902)
"The presence of pentoses can be readily detected with Tollens' orcin test. Tollens' orcin Test.—A few granules of orcin are dissolved in 4 to 5 cc of ..."

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