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
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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