| SN | sclerema neonatorum; scrub nurse; sensorineural; sensory neuron; serum neutralization; sinus node; s... |
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| SSN | severely subnormal; subacute sensory neuropathy; suprasternal notch |
| mastoid fontanel | The membranous interval on either side between the mastoid angle of the parietal bone, the petrous portion of the temporal bone, and the occipital bone. Synonym: fonticulus mastoideus, fonticulus posterolateralis, Casser's fontanel, posterolateral fontanel. (05 Mar 2000) |
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| mastoid foramen | An opening at the posterior portion of the mastoid process, transmitting the mastoid branch of the occipital artery to the dura and an emissary vein to the sigmoid sinus. Synonym: foramen mastoideum. (05 Mar 2000) |
| mastoid fossa | A small depression on the mastoid part of the temporal bone, posterior to the suprameatal spine. Synonym: foveola suprameatica, mastoid fossa, fossa mastoidea, supramastoid fossa. (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) |
| mastoid lymph nodes | Two or three nodes in the region of the mastoid process; they receive afferent lymphatic vessels from the scalp and auricle and send efferent vessels to the superior deep cervical nodes. Synonym: nodi lymphatici mastoidei, mastoid lymph nodes. (05 Mar 2000) |
| mastoid margin of occipital bone | The margin of the occipital squama that articulates with the temporal bone. Synonym: margo mastoideus squamae occipitalis, mastoid margin of occipital bone. (05 Mar 2000) |
| mastoid part of the temporal bone | The portion of the petrous part of the temporal bone bearing the mastoid process. Synonym: pars mastoidea ossis temporalis. (05 Mar 2000) |
| mastoid process | The nipple-like projection of the petrous part of the temporal bone. Synonym: processus mastoideus, mastoid bone, temporal apophysis. (05 Mar 2000) |
| mastoid sinuses | Numerous small intercommunicating cavities in the mastoid process of the temporal bone that empty into the mastoid or tympanic antrum. Synonym: cellulae mastoideae, mastoid cells, mastoid sinuses. (05 Mar 2000) |
| mastoid wall of middle ear | It contains the opening into the mastoid antrum. Synonym: paries mastoideus cavi tympani, mastoid wall of middle ear, posterior wall of middle ear. (05 Mar 2000) |
| acetabular notch | A gap in the inferior the margin of the acetabulum. Synonym: incisura acetabuli, cotyloid notch. (05 Mar 2000) |
| angular notch | A sharp angular depression in the lesser curvature of the stomach at the junction of the body with the pyloric canal. Synonym: incisura angularis, sulcus angularis. (05 Mar 2000) |
| antegonial notch | The highest point of the notch or concavity of the lower border of the ramus where it joins the body of the mandible. (05 Mar 2000) |
| anterior cerebellar notch | A wide, shallow notch on the anterior surface of the cerebellum occupied laterally by the superior cerebellar peduncles and the inferior quadrigeminal bodies medially. Synonym: anterior notch of cerebellum, incisura cerebelli anterior, semilunar notch. (05 Mar 2000) |
| anterior notch of cerebellum | A wide, shallow notch on the anterior surface of the cerebellum occupied laterally by the superior cerebellar peduncles and the inferior quadrigeminal bodies medially. Synonym: anterior notch of cerebellum, incisura cerebelli anterior, semilunar notch. (05 Mar 2000) |