liver extract definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
an extract consisting of the water-soluble, nonprotein constituents of fresh mammalian liver, that can promote the formation of blood cells
liver extract definition by American Heritage Dictionary
A dry brownish powder containing the soluble thermolabile fraction of mammalian livers that is capable of stimulating the production of red blood cells.