| sigmoid notch | The deep notch between the condylar and coronoid processes of the mandible. Synonym: incisura mandibulae, sigmoid notch. (05 Mar 2000) |
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| sphenopalatine notch | 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) |
| nasal notch | The notch in the medial border of the maxilla anteriorly which, with its fellow, forms most of the piriform opening of the nasal cavity. Synonym: incisura nasalis. (05 Mar 2000) |
| sternal notch | The V shaped notch at the top of the breastbone (sternum). (12 Dec 1998) |
| Notch | <molecular biology> A neurogenic gene of Drosophila. The normal function of Notch is required in ectodermal cells to prevent the cells from differentiating as neuroblasts. Gene product contains 36 repeats of the EGF like domain. (13 Nov 1997) |
| notch for round ligament of liver | The notch in the inferior border of the liver that accommodates the round ligament. Synonym: incisura ligamenti teretis hepatis, incisura umbilicalis, umbilical notch. (05 Mar 2000) |
| notch of apex of heart | A slight notch near the apex of the heart where the anterior interventricular sulcus reaches the diaphragmatic surface of the heart. Synonym: incisura apicis cordis. (05 Mar 2000) |
| notch of tentorium | 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) |
| superior thyroid notch | A deep notch in the middle of the upper border of the thyroid cartilage. Synonym: incisura thyroidea superior. (05 Mar 2000) |
| supraorbital notch | 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) |
| suprascapular notch | A notch on the superior border of the scapula through which the suprascapular nerve passes. Synonym: incisura scapulae, suprascapular notch. (05 Mar 2000) |
| suprasternal notch | The V shaped notch at the top of the breastbone (sternum). (12 Dec 1998) |
| dicrotic notch | The acute drop in arterial pressure pulse curves following the systolic peak, corresponding to the incisura of the displacement pulse curve. (05 Mar 2000) |
| digastric notch | The groove medial to the mastoid process of the temporal bone from which the digastric muscle originates. Synonym: incisura mastoidea, digastric groove, digastric notch, mastoid notch. (05 Mar 2000) |
| iliosciatic notch | The deep indentation in the posterior border of the hip bone at the point of union of the ilium and ischium. Synonym: incisura ischiadica major, iliosciatic notch, sacrosciatic notch. (05 Mar 2000) |