Definition of velum

• n. - Curtain or covering; -- applied to various membranous partitions, especially to the soft palate. See under Palate.
• n. - See Veil, n., 3 (b).
• n. - A thin membrane surrounding the sporocarps of quillworts Isoetes).
• n. - A veil-like organ or part.
• n. - The circular membrane that partially incloses the space beneath the umbrella of hydroid medusae.
• n. - A delicate funnel-like membrane around the flagellum of certain Infusoria. See Illust. a of Protozoa.