from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A crystalline sterol, C28H43OH, synthesized by yeast from sugars or derived from ergot and converted to vitamin D2 when exposed to ultraviolet radiation.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. The steroid precursor of vitamin D2. It is found in cell membranes of fungi, and is their functional equivalent of cholesterol. It is also found in the membranes of some protists.
from the GNU version of the Collaborative International Dictionary of English
- n. a plant sterol that is converted into vitamin D by ultraviolet radiation.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a plant sterol that is converted into vitamin D by ultraviolet radiation
ergo(t) + sterol.(American Heritage® Dictionary of the English Language, Fourth Edition)
ergo- + sterol (Wiktionary)