1. Physiology, Pathology. pertaining to bile or to an excess secretion of bile.
  2. Pathology. suffering from, caused by, or attended by trouble with the bile or liver.
  3. peevish; irritable; cranky.
  4. extremely unpleasant or distasteful: a long scarf of bright, bilious green.

Origin of bilious

From the Latin word bīliōsus, dating back to 1535–45. See bile, -ous
Related formsbil·ious·ly, adverbbil·ious·ness, nounnon·bil·ious, adjectivenon·bil·ious·ly, adverbnon·bil·ious·ness, nounun·bil·ious, adjectiveun·bil·ious·ly, adverbun·bil·ious·ness, noun

Synonyms for bilious Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for non-bilious

Historical Examples of non-bilious

British Dictionary definitions for non-bilious


  1. of or relating to bile
  2. affected with or denoting any disorder related to excess secretion of bile
  3. informal (esp of colours) extremely distasteful; nauseatinga bilious green
  4. informal bad-tempered; irritable
Derived Formsbiliousness, noun

Word Origin for bilious

C16: from Latin bīliōsus full of bile 1
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

Word Origin and History for non-bilious



1540s, "pertaining to bile, biliary," from French bilieux, from Latin biliosus "pertaining to bile," from bilis (see bile). Meaning "wrathful, peevish, ill-tempered" (as people afflicted with an excess of bile were believed to be) is attested from 1560s. This is the main modern sense in English and French; the more literal meaning being taken up by biliary. Related: Biliousness.

Online Etymology Dictionary, © 2010 Douglas Harper

non-bilious in Medicine


  1. Of, relating to, or containing bile; biliary.
  2. Characterized by an excess secretion of bile.
  3. Relating to, characterized by, or experiencing gastric distress caused by a disorder of the liver or gallbladder.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.