(Of rock or other material) full of minute cavities; porous.
- The remaining mass was rugged and cavernulous.
- Copper will not cast either solid or tenacious, but is cavernulous and weak.
- The two species have the same open, cavernulous, skeleton structure.
Mid 18th century: from Latin cavernula, diminutive of caverna 'cavern' + -ous.
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