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petro-occipital
petro-occipital adj.
Brit. 
/ˌpɛtrəʊɒkˈsɪpᵻtl/
, /ˌpɛtrəʊɒkˈsɪpᵻtl/U.S. /ˌpɛtroʊɑkˈsɪpəd(ə)l/
(also petroccipital) /ˌpɛtroʊɑkˈsɪpəd(ə)l/ΚΠ
1828 R. Knox tr. H. Cloquet Syst. Human Anat. 60 The first part of this line is named the Petro-Occipital Suture [Fr. suture pétro-occipitale].
1912 Biometrika 8 260 The basilar portion has on each side a cleft directed transversely inwards from the petro-occipital fissure.
1995 Radiology 196 747 The occipitomastoidal, petro-occipital, and spheno-occipital synchondroses remained partially open into the teenage years.
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