Recent Examples of petrous from the Web
All of those came from the petrous part of the temporal bone, which is the tough part of the skull behind the ear, from five different individuals.
DNA begins degrading immediately after death, so scientists look for pockets that tend to be preserved in hair, molar teeth, and the petrous bone near the inner ear.
But if there’s any hope of obtaining some, the sample would likely come from the teeth or petrous bone, since their extreme density protects DNA well.
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Origin and Etymology of petrous
First Known Use: 14th centurySee Words from the same year
medical Definition of petrous
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