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.
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.
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.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. a B vitamin that aids in body growth
Word Usage
"Grapefruit Seed contains the whole spectrum of the vitamin-B group, with a particularly high content of biotin, which is responsible for the utilization of dietary body fats, facilitating the metabolism of carbohydrates, fats and proteins (and the utilization of other B-complex vitamins)."