Biol. any of various veil-like membranous partitions or coverings; specif.,
- soft palate
- the lobed, ciliated swimming organ of gastropod larvae, located near the mouth
Origin of velumL, a veil
- Biology A covering or partition of thin membranous tissue, such as the veil of a mushroom, a rim of tissue around the margin of the bell of certain cnidarians, or a membrane of the brain.
- Anatomy The soft palate.
- Zoology A ciliated swimming and feeding organ that develops in certain larval stages of most gastropod and bivalve mollusks.
Origin of velumLatin vēlum veil
- A thin membrane, resembling a veil, such as:
- (anatomy) The soft palate.
- (botany) A thin membrane partially covering the cluster of sporangia near the leaf base in quillworts and their extinct relatives.
- (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.
- (malacology) A locomotory and feeding organ provided with cilia found in the larval stage of bivalves.
- (zoology) A circular membrane round the cap of medusa.
- A delicate membrane found on certain protists.
- (meteorology) An accessory cloud resembling a veil extending over a large distance. Normally associated with cumulus and cumulonimbus.
OriginSee also: vellum
From Latin velum (“veil, sail").