1. (Anat.) Curtain or covering; -- applied to various membranous partitions, especially to the soft palate. See under Palate. 2. (Bot.) (a) See Veil, n., 3 (b). (b) A thin membrane surrounding the sporocarps of quillworts Isoetes). 3. (Zoöl.) A veil-like organ or part. Especially: (a) The circular membrane that partially incloses the space beneath the umbrel...