| OD | Doctor of Optometry; obtained absorbance; occipital dysplasia; occupational dermatitis; occupational... |
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| OFD | object-film distance; occipital frontal diameter; oro-facial-digital [syndrome] |
| OH | hydroxycorticosteroid; obstructive hypopnea; occipital horn; occupational health; occupational histo... |
| OHS | obesity hypoventilation syndrome; occipital Horn syndrome; occupational health service; ocular histo... |
| OTS | occipital temporal sulcus; orotracheal suction |
| inferior occipital triangle | A triangle with its apex at the external occipital protuberance; its base is formed by a line joining the two mastoid processes. (05 Mar 2000) |
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| internal occipital crest | A ridge running from the internal occipital protuberance to the posterior margin of the foramen magnum, giving attachment to the falx cerebelli. Synonym: crista occipitalis interna. (05 Mar 2000) |
| internal occipital protuberance | A projection from about the centre of the cruciform eminence on the inner surface of the occipital bone. Synonym: protuberantia occipitalis interna. (05 Mar 2000) |
| occipital | <anatomy> Of or pertaining to the occiput, or back part of the head, or to the occipital bone. <anatomy> Occipital bone, the point of the occiput in the mesial plane farthest from the ophryon. Origin: Cf. F. Occipital. <anatomy> The occipital bone. Source: Websters Dictionary (01 Mar 1998) |
| occipital anchorage | Anchorage in which the top and back of the head are used for resistance by means of a headgear. (05 Mar 2000) |
| occipital artery | <anatomy, artery> Origin, external carotid; branches, sternocleidomastoid, meningeal, auricular, occipital, mastoid, and descending. Synonym: arteria occipitalis. (05 Mar 2000) |
| occipital belly of occipitofrontalis muscle | <anatomy> The posterior belly of the occipitofrontalis muscle. See: occipitofrontalis muscle. Synonym: venter occipitalis musculi occipitofrontalis, occipitalis muscle. (05 Mar 2000) |
| occipital border | Edge of a bone which articulates with the occipital bone. See: occipital border of parietal bone, occipital border of temporal bone. Synonym: margo occipitalis, occipital margin. (05 Mar 2000) |
| occipital branch | Nomina Anatomica lists occipital branches of 1) posterior auricular artery (rami occipitalis arteriae auricularis posterior; 2) posterior auricular nerve (rami occipitalis nervi auricularis posterioris; and 3) occipital artery, rami occipitales arteriae occipitis. Synonym: ramus occipitalis. (05 Mar 2000) |
| occipital cerebral veins | The superior cerebral veins draining the occipital cortex and emptying into the superior sagittal sinus and the transverse sinus. Synonym: venae occipitales. (05 Mar 2000) |
| occipital condyle | One of two elongated oval facets on the undersurface of the occipital bone, one on each side of the foramen magnum, which articulate with the atlas. Synonym: condylus occipitalis. (05 Mar 2000) |
| occipital emissary vein | <anatomy, vein> An inconstant vessel perforating the squama of the occipital bone to connect the occipital veins with the confluens sinuum. Synonym: vena emissaria occipitalis, emissarium occipitale. (05 Mar 2000) |
| occipital fontanel | A triangular interval at the union of the lambdoid and sagittal sutures where the occipital angles of the parietal bones meet the occipital. Synonym: fonticulus posterior, occipital fontanel. (05 Mar 2000) |
| occipital groove | A narrow groove medial to the mastoid notch of the temporal bone that lodges the occipital artery. Synonym: sulcus arteriae occipitalis, sulcus of occipital artery. (05 Mar 2000) |
| occipital gyri | See: inferior occipital gyrus, superior occipital gyrus. (05 Mar 2000) |