Pronunciation: (bīl), [key]
1. Physiol.a bitter, alkaline, yellow or greenish liquid, secreted by the liver, that aids in absorption and digestion, esp. of fats.
2. ill temper; peevishness.
3. Old Physiol.either of two humors associated with anger and gloominess. Cf. black bile, yellow bile.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.