Definition of velum
plural vela
play
\ˈvē-lə\
1
: a membrane or membranous part resembling a veil or curtain: such as
a
: soft palate
b
: an annular membrane projecting inward from the margin of the umbrella in some jellyfishes (such as the hydromedusae)
2
: a swimming organ that is especially well developed in the later larval stages of many marine gastropods
