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Medical Definition of Trigeminal impression
1. A depression on the anterior surface of the petrous portion of the temporal bone, near the apex, lodging the trigeminal ganglion. Synonym: impressio trigeminalis. (05 Mar 2000)
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1. A depression on the anterior surface of the petrous portion of the temporal bone, near the apex, lodging the trigeminal ganglion. Synonym: impressio trigeminalis. (05 Mar 2000)