Definify.com
Webster 1913 Edition
Velum
‖
1.
(Anat.)
A curtain or covering; – applied to various membranous partitions, especially to the soft palate. See under
Palate
. 2.
(Bot.)
(a)
(b)
A thin membrane surrounding the sporocarps of quillworts
Isoetes
). 3.
(Zool.)
A veil-like organ or part.
Especially: (a)
The circular membrane that partially incloses the space beneath the umbrella of hydroid medusae.
(b)
A delicate funnel-like membrane around the flagellum of certain Infusoria. See Illust. a of
Protozoa
.