[ awr-see-in ]
/ ˈɔr si ɪn /
a red dye, the principal coloring matter of cudbear and orchil, obtained by oxidizing an ammoniacal solution of orcinol.
DIVE INTO THIS BALMY SUMMERTIME SPELLING QUIZ
Do you often fall under the spell of the summer season? See if you can really spell your way through it with this quiz of popular summertime words.
Question 1 of 12
Origin of orcein
1830–40; arbitrary alteration of orcin; see orcinol
Words nearby orcein
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020
British Dictionary definitions for orcein
/ (ˈɔːsɪɪn) /
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
Medical definitions for orcein
[ ôr′sē-ĭn ]
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.