curtain or covering; -- applied to various membranous partitions, especially to the soft palate. see under palate.-see veil, n., 3 (b).-a thin membrane surrounding the sporocarps of quillworts isoetes).-a veil-like organ or part.-the circular membrane that partially incloses the space beneath the umbrella of hydroid medusae.-a delicate funnel-like membrane around the flagellum of certain infusoria. see illust. a of protozoa.