orcein

[ awr-see-in ]
/ ˈɔr si ɪn /

noun Chemistry.

a red dye, the principal coloring matter of cudbear and orchil, obtained by oxidizing an ammoniacal solution of orcinol.

Nearby words

  1. orby,
  2. orc,
  3. orca,
  4. orcadian,
  5. orcagna,
  6. orch.,
  7. orchard,
  8. orchard bush,
  9. orchard grass,
  10. orchard oriole

Origin of orcein

1830–40; arbitrary alteration of orcin; see orcinol

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019


British Dictionary definitions for orcein

orcein

/ (ˈɔːsɪɪn) /

noun

a brown crystalline material formed by the action of ammonia on orcinol and present in orchil: used as a dye, biological stain, and antiseptic. Formula: C 28 H 24 O 7 N 2

Word Origin for orcein

C19: see orcinol

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medicine definitions for orcein

orcein

[ ôrsē-ĭn ]

n.

A natural dye derived from orcinol and used in various histologic staining methods as a purple dye complex.

The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.