Definition of velum:
(n) :
(anatomy) The soft palate.
(n) :
(mycology) A veil-like membrane of immature mushrooms extending from the margin of the cap to the stem and is torn by growth, to reveal the gills.
(n) :
A thin membrane resembling a veil or curtain.
(n) :
(malacology) A locomotory and feeding organ provided with cilia found in the larval stage of bivalves.
(n) :
(zoology) An annular membrane, typically bordering a cavity, especially in certain molluscs, medusae, and other invertebrates.
(n) :
A delicate membrane found on certain protists.