ˈvälvə noun
( -s )
Etymology: New Latin, from Latin volva, vulva covering, integument, womb — more at vulva
: a membranous bulbous sac or cup that surrounds the base of the stipe in many gill fungi (as of the genus Amanita ) and is formed by the rupture of the universal veil — compare velum
[s]volva.jpg[/s]