| incisura pterygoidea | The cleft between the medial and lateral laminae of the pterygoid process of the sphenoid bone into which the pyramidal process of the palatine bone is fitted. Synonym: incisura pterygoidea, fissura pterygoidea, pterygoid notch. (05 Mar 2000) |
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| incisura radialis | The concavity on the lateral aspect of the coronoid process of the ulna that articulates with the head of the radius. Synonym: incisura radialis. (05 Mar 2000) |
| incisura rivini | The notch in the superior part of the tympanic ring bridged by the flaccid part of the tympanic membrane. Synonym: incisura tympanica, incisura rivini, Rivinus' incisure, Rivinus' notch, tympanic incisure. (05 Mar 2000) |
| incisura scapulae | A notch on the superior border of the scapula through which the suprascapular nerve passes. Synonym: incisura scapulae, suprascapular notch. (05 Mar 2000) |
| incisura semilunaris ulnae | The large saemicircular notch at the proximal extremity of the ulna between the olecranon and coronoid processes that articulates with the trochlea of the humerus. Synonym: incisura trochlearis, incisura semilunaris ulnae, semilunar notch. (05 Mar 2000) |
| incisura sphenopalatina | The deep notch between the orbital and sphenoidal processes of the palatine bone which is converted into the foramen of the same name by the undersurface of the sphenoid bone. Synonym: incisura sphenopalatina. (05 Mar 2000) |
| incisura supraorbitalis | A groove in the orbital margin of the frontal bone, about the junction of the medial and intermediate thirds, through which pass the supraorbital nerve and artery. See: supraorbital foramen. Synonym: incisura supraorbitalis. (05 Mar 2000) |
| incisura tentorii | The triangular opening in the tentorium cerebelli through which the brainstem extends from the posterior into the middle cranial fossa. Synonym: incisura tentorii, notch of tentorium. (05 Mar 2000) |
| incisura terminalis auris | A deep notch separating the lamina tragi and cartilage of the external auditory meatus from the main auricular cartilage, the two being connected below by the isthmus. Synonym: incisura terminalis auris, auricular notch. (05 Mar 2000) |
| incisura thyroidea inferior | A shallow notch in the middle of the lower border of the thyroid cartilage. Synonym: incisura thyroidea inferior. (05 Mar 2000) |
| incisura thyroidea superior | A deep notch in the middle of the upper border of the thyroid cartilage. Synonym: incisura thyroidea superior. (05 Mar 2000) |
| incisura tragica | The deep notch in the lower part of the auricle between the tragus and antitragus. Synonym: incisura intertragica, incisura tragica. (05 Mar 2000) |
| incisura trochlearis | The large saemicircular notch at the proximal extremity of the ulna between the olecranon and coronoid processes that articulates with the trochlea of the humerus. Synonym: incisura trochlearis, incisura semilunaris ulnae, semilunar notch. (05 Mar 2000) |
| incisura tympanica | The notch in the superior part of the tympanic ring bridged by the flaccid part of the tympanic membrane. Synonym: incisura tympanica, incisura rivini, Rivinus' incisure, Rivinus' notch, tympanic incisure. (05 Mar 2000) |
| incisura ulnaris | The concave surface on the medial side of the distal end of the radius which articulates with the head of the ulna. Synonym: incisura ulnaris. (05 Mar 2000) |