VIL'LOUS, a. [l. villosus, from villus, hair, Eng. wool.]1. Abounding with fine hairs or wooly substance; nappy shaggy; rough; as a villous coat.The villous coat of the stomach and intentines is the inner mucous membrane, so called from the innumerable villi or fine fibrils with which its internal surface is covered.2. In botany, pubescent; covered with soft hairs.