bile

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A bitter, alkaline, brownish-yellow or greenish-yellow fluid that is secreted by the liver, stored in the gallbladder, and discharged into the duodenum and aids in the emulsification, digestion, and absorption of fats.
• noun Bitterness of temper; ill humor; irascibility.
• noun Either of two bodily humors, black bile or yellow bile, in ancient and medieval physiology.

from The Century Dictionary.

• noun An inflamed tumor; a boil. See boil.
• noun A yellow bitter liquid secreted by the liver and collected by the biliary ducts to be conveyed into the duodenum.
• noun Figuratively, ill nature; peevishness; bitterness of feeling: because the bile was fancied to be the seat of ill humor.
• noun An obsolete form of bill.

from the GNU version of the Collaborative International Dictionary of English.

• noun (Physiol.) A yellow, or greenish, viscid fluid, usually alkaline in reaction, secreted by the liver. It passes into the intestines, where it aids in the digestive process. Its characteristic constituents are the bile salts, and coloring matters.
• noun Bitterness of feeling; choler; anger; ill humor.
• noun Obs. or Archaic A boil.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun obsolete A boil (kind of swelling).
• noun biochemistry A bitter brownish-yellow or greenish-yellow secretion produced by the liver, stored in the gall bladder, and discharged into the duodenum where it aids the process of digestion.
• noun bitterness of temper; ill humour; irascibility.
• noun Two of the four humours, black bile or yellow bile, in ancient and medieval physiology.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun a digestive juice secreted by the liver and stored in the gallbladder; aids in the digestion of fats