- very hard or stony
Origin of petrosal< ModL petrosa < ML (os) petrosus, petrosal (bone)Anat. of or located near the petrous part of the temporal bone
Origin of petrosalfrom Classical Latin petrosus, rocky: see petrous and -al
Origin of petrosalFrom Latin petrōsus rocky ; see petrous .
- (anatomy) Of, pertaining to, or located near the petrous part of the temporal bone
Part or all of this entry has been imported from the 1913 edition of Webster's Dictionary, which is now free of copyright and hence in the public domain. The imported definitions may be significantly out of date, and any more recent senses may be completely missing.