| a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison. |
| a screen or mat covered with a dark material for shielding a camera lens from excess light or glare. |
| volva (vŏl'və, vôl'-) Pronunciation Key
A cuplike structure around the base of the stalk of certain basidiomycete fungi. |