from The American Heritage® Dictionary of the English Language, 4th Edition
- n. Biology A covering or partition of thin membranous tissue, such as the veil of a mushroom or a membrane of the brain.
- n. Anatomy The soft palate.
- n. Zoology A ciliated swimming organ that develops in certain larval stages of most marine gastropod mollusks.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A thin membrane, resembling a veil, such as:
- n. An accessory cloud resembling a veil extending over a large distance. Normally associated with cumulus and cumulonimbus.
from the GNU version of the Collaborative International Dictionary of English
- n. A curtain or covering; -- applied to various membranous partitions, especially to the soft palate. See under Palate.
- n. See Veil, n., 3 (b).
- n. A thin membrane surrounding the sporocarps of quillworts Isoetes).
- n. A veil-like organ or part.
- n. The circular membrane that partially incloses the space beneath the umbrella of hydroid medusæ.
- n. A delicate funnel-like membrane around the flagellum of certain Infusoria. See Illust. a of Protozoa.
from The Century Dictionary and Cyclopedia
- n. [capitalized] One of the subdivisions of the constellation Argo Navis. See Argo, 2.
- n. Same as velarium, 1.
- n. In botany: In Hymenomycetes, a special membranous envelop which incloses for a time the whole or a part of the sporophore.
- n. In Isoëtes, the outgrown membranous margin of the fovea. Also called involucrum.
- n. In Mollusca, the highly characteristic ciliated formation of the embryo, which serves as an organ of locomotion in that stage when the embryo is called a veliger. It is usually soon lost, but in some cases is permanently retained in a modified form. See cuts under veliger.
- n. In Hydrozoa, a kind of flap or circular free edge which projects inward around the margin of the disk of many hydrozoans, as those which are bell-shaped or conical, and which from its presence are called craspedote; a velarium.
- n. In Infusoria, a delicate veil-like membrane bordering the mouth in such forms as Cyclidium and Pleuronema.
- n. In sponges, one of the transverse diaphragms or partitions which constrict the lumen of an incurrent or excurrent canal.
- n. In Rotifera, the trochal disk. See cuts under trochal, Rotifer, and Rotifera.
- n. In entomology, a membrane attached to the inner side of the cubital spur in certain bees.
- n. In anatomy, a veil, or a part likened to a veil.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a membranous covering attached to the immature fruiting body of certain mushrooms
- n. a muscular flap that closes off the nasopharynx during swallowing or speaking
Latin vēlum, veil.(American Heritage® Dictionary of the English Language, Fourth Edition)
From Latin velum ("veil, sail"). (Wiktionary)