WOOL

noun Usage: often attributive Etymology: Middle English wolle, from Old English wull; akin to Old High German wolla ~, Latin vellus fleece, lana ~ Date: before 12th century the soft wavy or curly usually thick undercoat of various hairy mammals and especially the sheep made up of a matrix of keratin fibers and covered with minute scales, a product of ~, 3. a dense felted pubescence especially on a plant ; tomentum , a filamentous mass