Pe″trous (?), a. [L. petrosus, fr. petra a stone.] 1. Like stone; hard; stony; rocky; as, the petrous part of the temporal bone. Hooper.
2. (Anat.) Same as Petrosal.
Webster's Dictionary 1913
Pe″trous (?), a. [L. petrosus, fr. petra a stone.] 1. Like stone; hard; stony; rocky; as, the petrous part of the temporal bone. Hooper.
2. (Anat.) Same as Petrosal.