Velum

Velum , noun

[Latin, an awning, a veil. See Veil.]

(Anatomy) A curtain or covering; -- applied to various membranous partitions, especially to the soft palate. See under Palate.

(a) (Botany) See Veil, n., 3 (b).

(b)

(Botany) A thin membrane surrounding the sporocarps of quillworts Isoetes).

(Zoology) A veil-like organ or part.

(a)

(Zoology) The circular membrane that partially incloses the space beneath the umbrella of hydroid medusae.

(b)

(Zoology) A delicate funnel-like membrane around the flagellum of certain Infusoria. See Illust. a of Protozoa.