noun, plural vela [vee-luh] , for 1, 2, velum for 3.
Biology. any of various veillike or curtainlike membranous partitions.
Anatomy. the soft palate. See under palate ( def 1 ).
Meteorology. a thin cloud, large in horizontal area, that is draped over or penetrated by cumuliform clouds.

1765–75; < Latin vēlum sail, covering Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
velum (ˈviːləm)
n , pl -la
1.  zoology any of various membranous structures, such as the ciliated oral membrane of certain mollusc larvae or the veil-like membrane running around the rim of a jellyfish
2.  anatomy any of various veil-like bodily structures, esp the soft palate
3.  botany another word for veil
[C18: from Latin: veil]

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

velum ve·lum (vē'ləm)
n. pl. ve·la (-lə)

  1. An anatomical structure resembling a veil or curtain. Also called veil, velamen.

  2. See greater omentum.

  3. A serous membrane or membranous envelope or covering.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Example sentences
The name derives from the velum, a distinctive organ used for locomotion and feeding.
Using permanent marker trace that room, furniture arrangement and lighting on velum.
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