1A membrane or membranous structure, typically covering another structure or partly obscuring an opening.
- 1.1Anatomy The soft palate.‘The back of the tongue lies opposite the soft palate or velum when the tongue is in a state of rest, and sounds made with the back include velar consonants and back vowels.’
- ‘This technique allows for closure of the velum, thus excluding nasal NO contamination during expiration.’
- ‘For ‘mouth breathing’ protocols, patients were instructed with a technique aimed at achieving velum closure of the nasopharynx and asked to practice it prior to testing.’
- 1.2Zoology A membrane, typically bordering a cavity, especially in certain mollusks, medusae, and other invertebrates.‘Scyphozoan medusae differ from those of hydrozoans in lacking a velum.’
- ‘Adult heteromorphs show wide velum; the velum in tecnomorphs is narrower.’
- ‘Free-living medusoid hydrozoans can be hard to tell from scyphozoans, but hydrozoan medusae generally have a muscular shelf, or velum, projecting inward from the margin of the bell.’
- ‘This fact, together with the fragility of the velum, may cause problems for identification of growth stage and sex of the particular specimen.’
- ‘Its multispiral, heavily sculptured, darkly colored shell, plus its large four-lobed velum, point to a different type of snail, one of the neogastropods.’
- 1.3Botany The veil of a toadstool.
- 1.1Anatomy The soft palate.
Mid 18th century from Latin, literally ‘sail, curtain, covering, veil’.