occision (oksizhon)

[ This kind of occision of a man according to the laws of the kingdom, and in execution thereof, ought not to be numbered in the rank of crimes. Sir M. Hale, Pleas of Crown, xlii. (a) In craniom ., terior diameter of the skull, measured from the glabella in front. Also called maximum occipital point. (b) The intersection of the visual axis with the spherical field of regard behind the head. - Occipital protuberance. (a) Exter nal, a bony prominence in midline of the outer surface of the occiput, at the height to which the muscles of the nape attain, and at the point of insertion of the lig amentum nuche; the inion. (b) Internal, the point of intersection of the vertical and horizontal ridges on the inner surface of the occipital bone. - Occipital segment, in trilobites, the hindmost part of the glabellum. Occipital sinus, a small venous channel in the falx cerebelli, opening into the torcular Hero phil i. It is sometimes double. - Occipital style, in ornith., a bony style in the muscles of the nape, attached to the occiput of some birds, as cormorants. -Occipital triangle. (a) In an at. and surg., the triangle at the side of the neck bounded by the sternomastoid, trapezius, and omohyoid muscles. (b) In craniom., one of two triangles, the superior and the inferior, having the biparietal and bimastoid diameters for their bases respectively, and their apices at the inion. - Occipital veins, veins of the occiput emptying into the deep cervical or internal jugular. - Occipital vertebra, the occipital bone, in the vertebral theory of the skull. Das i occipital, compound II. n. 1. In zoöl . and an at ., the occipital bone; the bone of the hindhead; a compound bone, consisting of a bas i occipital, a supra occipital, and a pair of exoccipital bones, circumscribing the foramen magnum, and together constituting the first or occipital segment of the skull. These several elements commonly coalesce; but the bas i occipital may be represented only by cartilage, as in a batrachian; or some of the elements may unite with otic elements and not with other occip ital elements; or several of the elements may unite with one another and also with sphenoid, parietal, and temporal elements. The occipital bears two condyles for articulation with the atlas in all mammals; one in all Sauropsida (birds and reptiles); one (or, if two, as in a batrachian, with no o ified bas i occipital) in Ichthyopsid a. See cuts under Balænide, Catarrh in a, craniofacial, cranium, Cyclodus, Esox, Felidæ, and skull. 2. In herpet., one of a pair of plates or scutes upon the occiput of many serpents. See cut under Coluber.-3. The occipital is muscle. occipital is (ok-sip-i-tā'lis), n. [NL., mastoid or mas to-occipital suture. occipitomental (ok-sip"i-to-men'tal), a. and n. I. a. Of or pertaining to the occiput and the IMG:content-1611.png:[blocks in formation] occipitoparietal (ok-sip"i-to-pā-rī'e-tal), a. Pertaining to the occipital and parietal bones or regions of the skull: as, the occipitoparietal or lambdoid suture. occipitopharyngeus (ok-sip"i-to-fā-rin'jē-us), n.; pl. occipitopharyngei (-1). [NL.] A supernumerary muscle in man, extending from the "i-to-pol-i-kā'lis), n.; basilar proce to the wall of the pharynx. occipitopollicalis (ok-sip"i-to-pol-i-ka'l pl.occipitopollicales (-lēz). [NL.] A remarkable muscle of bats, extending from the hindhead to the terminal phalanx of the thumb. Mac a lister, Philosophical Transactions, 1872.