| 释义 |
velumenUK
ve·lum V0048700 (vē′ləm)n. pl. ve·la (-lə) 1. 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.2. Anatomy The soft palate.3. Zoology A ciliated swimming and feeding organ that develops in certain larval stages of most gastropod and bivalve mollusks.
[Latin vēlum, veil.]velum (ˈviːləm) n, pl -la (-lə) 1. (Zoology) 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 jellyfish2. (Anatomy) anatomy any of various veil-like bodily structures, esp the soft palate3. (Botany) botany another word for veil6[C18: from Latin: veil]ve•lum (ˈvi ləm)
n., pl. -la (-lə) 1. Biol. any of various veillike or curtainlike membranous partitions. 2. the soft palate. See under palate (def. 1). 3. the frontal ciliated swimming organ of gastropod larvae. [1765–75; < Latin vēlum sail, covering] Thesaurus| Noun | 1. |  velum - a membranous covering attached to the immature fruiting body of certain mushroomsveilplant part, plant structure - any part of a plant or fungusuniversal veil - 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 cappartial veil - 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 | | 2. |  velum - a muscular flap that closes off the nasopharynx during swallowing or speakingsoft palateuvula - a small pendant fleshy lobe at the back of the soft palatepalate, roof of the mouth - the upper surface of the mouth that separates the oral and nasal cavitiesflap - a movable piece of tissue partly connected to the body |
TranslationsVelumenUK
velum[′vē·ləm] (biology) A veil- or curtainlike membrane. (invertebrate zoology) A swimming organ on the larva of certain marine gastropod mollusks that develops as a contractile ciliated collar-shaped ridge. Also known as veil. (meteorology) An accessory cloud veil of great horizontal extent draped over or penetrated by cumuliform clouds; velum occurs with cumulus and cumulonimbus. Velum (1) An organ of locomotion and seizing food in medusae, siphonophores, and the larvae of many marine mollusks (veligers). In medusae and in the floating bells of the siphonophores, the velum is an overhanging border edging of the umbrella. Because of contraction of the circularly placed epithelial-muscle (in medusae) or muscle (in siphonophores) cells, the velum is pressed against the interior surface of the umbrella and, by expelling water from under it, causes locomotion of the animal. In veligers the velum, located at the front end of the body, resembles a fringed disk, often of complex form and covered with cilia. (2) A fold of the mucous membrane in the lancelet that divides the preoral hood from the pharyngeal cavity. velumenUK
velum [ve´lum] (L.) a covering structure; see also veil. adj., adj ve´lar.velum interpo´situm the membranous roof of the third ventricle of the brain.medullary velum either of the two portions (superior and inferior medullary velum) of the white matter of the hindbrain that form the roof of the fourth ventricle.palatine velum (velum palati´num) the soft palate; see palate" >palate.ve·lum, pl. ve·la (vē'lŭm, -lă), 1. Any structure resembling a veil or curtain. Synonym(s): veil (1) , velamen, velamentum2. Synonym(s): caul (1) 3. Synonym(s): greater omentum4. Any serous membrane or membranous envelope or covering. [L. veil, sail] velum (vē′ləm)n. pl. ve·la (-lə) 1. An anatomical structure resembling a veil or curtain.2. See greater omentum.3. A serous membrane or membranous envelope or covering.velum Greater omentum; omentum majus [NA6].ve·lum, pl. vela (vē'lŭm, -lă) 1. Any structure resembling a veil or curtain.
Synonym(s): veil (1) , velamen. 2. Synonym(s): caul (1) . 3. Synonym(s): greater omentum. 4. Any serous membrane or membranous envelope or covering. [L. veil, sail]ve·lum, pl. vela (vē'lŭm, -lă) 1. Any structure resembling a veil or curtain.
Synonym(s): veil (1) , velamen. 2. Synonym(s): caul (1) . 3. Synonym(s): greater omentum. 4. Any serous membrane or membranous envelope or covering. [L. veil, sail]See VEL
See VELvelumenUK
Related to velum: velum interpositumSynonyms for velumnoun a membranous covering attached to the immature fruiting body of certain mushroomsSynonymsRelated Words- plant part
- plant structure
- universal veil
- partial veil
noun a muscular flap that closes off the nasopharynx during swallowing or speakingSynonymsRelated Words- uvula
- palate
- roof of the mouth
- flap
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