| auriculoventricular groove | A groove on the outer surface of the heart marking the division between the atria and the ventricles. Synonym: sulcus coronarius, atrioventricular groove, atrioventricular sulcus, auriculoventricular groove, coronary sulcus. (05 Mar 2000) |
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| bicipital groove | A furrow running down the shaft of the humerus between the two tubercles, lodging the tendon of the long head of the biceps, and giving attachment in its floor to the latissimus dorsi muscle. Synonym: sulcus intertubercularis, bicipital groove, intertubercular sulcus. (05 Mar 2000) |
| branchial groove | An external embryonic groove between contiguous branchial arches. See: branchial clefts. (05 Mar 2000) |
| palatine groove | One of a number of grooves on the lower surface of the palatine process of the maxilla in which the palatine vessels and nerves lie. Synonym: sulcus palatinus. (05 Mar 2000) |
| palatovaginal groove | A furrow on the inferior aspect of the vaginal process of the sphenoid bone that is bridged below by the sphenoidal process of the palatine bone to form the palatovaginal canal. Synonym: sulcus palatovaginalis. (05 Mar 2000) |
| major groove | In a detailed analysis of DNA structure, there are two types of grooves that can be seen; the major groove has the nitrogen and oxygen atoms of the base pairs pointing inward toward the helical axis, while in the minor groove, the nitrogen and oxygen atoms point outwards; important because the major groove is more dependent on base composition and may be the site for protein recognition of specific DNA sequences or regions. (05 Mar 2000) |
| paraglenoid groove | A groove on the pelvic surface of the ilium just lateral to the auricular surface; it is more pronounced in the female. Synonym: paraglenoid groove, paraglenoid sulcus, preauricular sulcus, sulcus paraglenoidalis. (05 Mar 2000) |
| vertebral groove | The depression bounded by the spinous processes and laminae of the vertebrae, in which lie the deep muscles of the back. (05 Mar 2000) |
| carotid groove | The groove on the body of the sphenoid bone in which the internal carotid artery lies in its course through the cavernous sinus. Synonym: sulcus caroticus, carotid sulcus, cavernous groove. (05 Mar 2000) |
| carpal groove | The concavity on the anterior surface of the arch formed by the carpal bones. Synonym: sulcus carpi, carpal canal. (05 Mar 2000) |
| mastoid groove | 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) |
| gingivobuccal groove | The upper and lower half of the buccal vestibule on each side. Synonym: alveolobuccal sulcus, gingivobuccal groove, gingivobuccal sulcus. (05 Mar 2000) |
| gingivolabial groove | The upper and lower half of the labial vestibule, in the embryo, the groove formed by the deepening of the labial sulcus; its inner wall becomes incorporated with the alveolar process of the mandible or the maxilla, and its outer wall with the lips and cheeks. Synonym: alveololabial sulcus, gingivolabial groove, gingivolabial sulcus. (05 Mar 2000) |
| gingivolingual groove | That part of the oral cavity proper, on each side of the frenulum linguae, between the tongue and the mandibular alveolar process or ridge, in the embryo, the groove on each side between the lingual primordium and the alveolar elevations of the mandible. Synonym: alveololingual sulcus, gingivolingual groove, gingivolingual sulcus. (05 Mar 2000) |
| cavernous groove | The groove on the body of the sphenoid bone in which the internal carotid artery lies in its course through the cavernous sinus. Synonym: sulcus caroticus, carotid sulcus, cavernous groove. (05 Mar 2000) |