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petri-
Petri dish
petrifaction
Petrified Forest National Park
petrify
Petrine
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petrosal
pe·tro·sal [ pə trṓss'l ]


adjective 
Definition:
 
affecting part of temporal bone: affecting or belonging to the hard petrous portion of the temporal bone surrounding the inner ear
[Mid-18th century. < Latin petrosus (see petrous)]
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