petrous

pe·trous

adj \ˈpe-trəs, ˈpē-\

Definition of PETROUS

: of, relating to, or constituting the exceptionally hard and dense portion of the human temporal bone that contains the internal auditory organs

Origin of PETROUS

Middle English, from Anglo-French *petros, from Latin petrosus, from petra rock, from Greek

First Known Use: 14th century