from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A colorless crystalline vitamin, C10H16N2O3S, of the vitamin B complex, essential for the activity of many enzyme systems and found in large quantities in liver, egg yolk, milk, and yeast.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A sulfur-containing member of the vitamin B complex found in liver, egg yolk, milk and yeast, essential to the activity of multiple enzyme systems.
from the GNU version of the Collaborative International Dictionary of English
- n. a B vitamin (C10H16N2O3S) that aids in body growth; -- called also vitamin H and coenzyme R. It functions as a coenzyme in many carboxylation reactions.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a B vitamin that aids in body growth
Greek biōtos, life; see biotic + -in.(American Heritage® Dictionary of the English Language, Fourth Edition)