Lithophyse
Pronunciation : Lith"o*physe
Part of Speech : n.
Etymology : [Litho- + Gr. (Min.)
Definition : Defn: A spherulitic cavity often with concentric chambers, observed in some volcanic rocks, as in rhyolitic lavas. It is supposed to be produced by expanding gas, whence the name.
Source : Webster's Unabridged Dictionary, 1913