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
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