| petrological | Of or pertaining to petrology. Source: Websters Dictionary (01 Mar 1998) |
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| petrologically | According to petrology. Source: Websters Dictionary (01 Mar 1998) |
| petrologist | One who is versed in petrology. Source: Websters Dictionary (01 Mar 1998) |
| petrology | 1. <study> The department of science which is concerned with the mineralogical and chemical composition of rocks, and with their classification: lithology. 2. A treatise on petrology. (04 Mar 1998) |
| petromastoid | <anatomy> Of or pertaining to the petrous and mastoid parts of the temporal bone, periotic. Origin: Petro + mastoid. Source: Websters Dictionary (01 Mar 1998) |
| Petromyzon | Primitive marine vertebrate (Class Agnatha) with eel like body and lacking true jaws. Their relatively simple nervous system has been studied in some detail. (18 Nov 1997) |
| petromyzont | <zoology> A lamprey. Origin: Petro + Gr. To suck in. Source: Websters Dictionary (01 Mar 1998) |
| petropharyngeus | See: musculus petropharyngeus. (05 Mar 2000) |
| petrosa | The petrous portion of the temporal bone. Origin: L. Fr. Petra, rock (05 Mar 2000) |
| petrosal | <anatomy> Hard; stony; petrous; as, the petrosal bone; petrosal part of the temporal bone. Of, pertaining to, or in the region of, the petrous, or petrosal, bone, or the corresponding part of the temporal bone. <anatomy> Petrosal bone, a bone corresponding to the petrous portion of the temporal bone of man; or one forming more or less of the periotic capsule. See: Petrous. <anatomy> A petrosal bone. The auditory capsule. Source: Websters Dictionary (01 Mar 1998) |
| petrosal 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) |
| petrosal branch of middle meningeal artery | <anatomy, artery> Petrous branch of middle meningeal artery; first intracranial branch of middle meningeal artery; anastomosis: stylomastoid artery via hiatus of facial canal. Synonym: ramus petrosus arteriae meningeae mediae. (05 Mar 2000) |
| petrosal foramen | An occasional opening in the greater wing of the sphenoid bone, between the foramen spinosum and foramen ovale, which transmits the lesser petrosal nerve. Synonym: foramen petrosum, canaliculus innominatus, foramen of Arnold. (05 Mar 2000) |
| petrosal fossa | A small and often only faintly marked depression on the inferior surface of the petrous portion of the temporal bone, between the jugular fossa and the opening of the carotid canal; here opens the canaliculus tympanicus transmitting the tympanic nerve. Synonym: fossula petrosa, petrosal fossa, receptaculum ganglii petrosi. (05 Mar 2000) |
| petrosal fossula | A small and often only faintly marked depression on the inferior surface of the petrous portion of the temporal bone, between the jugular fossa and the opening of the carotid canal; here opens the canaliculus tympanicus transmitting the tympanic nerve. Synonym: fossula petrosa, petrosal fossa, receptaculum ganglii petrosi. (05 Mar 2000) |