1713, in the meaning defined above
Latin petrōsus "rocky, stony" (in New Latin os petrōsum, apophysis petrōsa, names for the petrous portion of the temporal bones) + -al entry 1 — more at petrous
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More Definitions for petrosal
petrosal
(Entry 1 of 2)
Medical Definition of petrosal (Entry 2 of 2)
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