| periotic | <anatomy> Surrounding, or pertaining to the region surrounding, the internal ear; as, the periotic capsule. A periotic bone. Origin: Pref. Peri- + Gr, the ear. Source: Websters Dictionary (01 Mar 1998) |
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| periotic bone | The part of the temporal bone that contains the structures of the inner ear and the second part of the internal carotid artery; in antenatal life it appears as a separate ossification centre. Synonym: pars petrosa ossis temporalis, periotic bone, petrosal bone, petrous pyramid. (05 Mar 2000) |
| periotic cartilage | A cartilaginous mass on either side of the chondrocranium surrounding the developing auditory vesicle in the foetus; the otic capsule in its early cartilaginous stage. (05 Mar 2000) |