The American Heritage® Dictionary of the English Language, 4th Edition
n. Any of various phosphorus-containing lipids, such as lecithin and cephalin, that are composed mainly of fatty acids, a phosphate group, and a simple organic molecule. Also called phosphatide.
n. any lipid, such as lecithin or cephalin, consisting of a diglyceride combined with a phosphate group and a simple organic molecule such as choline or ethanolamine; they are important constituents of biological membranes
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. any of various compounds composed of fatty acids and phosphoric acid and a nitrogenous base; an important constituent of membranes
Word Usage
"We assumed that following serum addition, cell membranes undergo major changes that will be reflected in phospholipid metabolism."