( n. )
Any one of numerous species of siliceous fossil sponges belonging to Ventriculites and allied genera, characteristic of the Cretaceous period.
( n. )
Any one of numerous species of siliceous fossil sponges belonging to Ventriculites and allied genera, characteristic of the Cretaceous period.
Webster's Revised Unabridged English Dictionary. Пересмотренный полный словарь английского языка Webster. 2012