Milk vetch \Milk" vetch`\ (Bot.) A leguminous herb ({Astragalus glycyphyllos}) of Europe and Asia, supposed to increase the secretion of milk in goats. Note: The name is sometimes taken for the whole genus {Astragalus}, of which there are about two hundred species in North America, and even more elsewhere.
milk vetch n : any of various plants of the genus Astragalus [syn: {milk-vetch}]