velum
ve·lum / ˈvēləm/ • n. (pl. ve·la / -lə/ ) a membrane or membranous structure, typically covering another structure or partly obscuring an opening, in particular: ∎ Anat. the soft palate. ∎ Zool. a membrane, typically bordering a cavity, esp. in certain mollusks, medusae, and other invertebrates. ∎ Bot. the veil of a toadstool.
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velum
velum From the Latin velum, ‘ship's sail’. 1. In Mollusca, the ciliated lobe possessed by the veliger larva.2. In most hydroid medusae (Cnidaria), a ridge or narrow shelf inside the border of the sub-umbrellar (See UMBRELLAR) cavity which reduces the size of the subumbrellar aperture and so increases the force of the water jet by which the medusa swims vertically.
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velum
velum An accessory cloud feature of cumulus or cumulonimbus, characterized by a widespread veil on or above the upper surface of the cloud. See also CLOUD CLASSIFICATION.
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velum
velum An accessory cloud feature of cumulus or cumulonimbus, characterized by a widespread veil on or above the upper surface of the cloud. See also cloud classification.
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velum
velum
1. A flap of membranous tissue that protects a sporangium in Isoetaceae.
2. In certain toadstools and mushrooms, the remains of the partial veil after it has ruptured.
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velum
velum (anat.) soft palate XVIII; (zool., bot.) membranous structure XIX. — modL. use (in full v. palati, v. pendulum veil of the palate, pendulous veil) of L. vēlum (see VEIL).
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VELUM
VELUM, also soft palate. The soft part of the roof of the mouth, behind the hard palate. There are two adjectives: velar, for the velum itself and sounds made by raising the back of the tongue towards the velum; velaric, referring to a stream of air. See ARTICULATION SPEECH.
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velum
velum (pl. vela). Segment of the awning (velarium) of a Roman amphitheatre, etc.
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velum
velum See annulus.
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