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Definitions for: Velum
[n] a muscular flap that closes off the nasopharynx during swallowing or speaking
[n] membrane initially completely investing the young sporophore of various mushrooms that is ruptured by growth; represented in the mature mushroom by a volva around lower part of stem and scales on upper surface of the cap
[n] membrane of the young sporophore of various mushrooms extending from the margin of the cap to the stem and is ruptured by growth; represented in mature mushroom by an annulus around the stem and sometimes a cortina on the margin of the cap
Webster (1913) Definition: Ve"lum, n.; pl. Vela. [L., an awning, a veil. See
Veil.]
1. (Anat.) Curtain or covering; -- applied to various
membranous partitions, especially to the soft palate. See
under Palate.
2. (Bot.)
(a) See Veil, n., 3
(b) .
(b) A thin membrane surrounding the sporocarps of
quillworts Isoetes).
3. (Zo["o]l.) A veil-like organ or part. Especially:
(a) The circular membrane that partially incloses the
space beneath the umbrella of hydroid medus[ae].
(b) A delicate funnel-like membrane around the flagellum
of certain Infusoria. See Illust. a of Protozoa.
Synonyms: partial veil, soft palate, universal veil
See Also: annulus, cortina, flap, palate, plant part, roof of the mouth, uvula
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