arcubust

One of the numerous variants arcula, n. Plural of arculum. Arculirostres (är kū-li-ros'trēz), arculum (är'kū-lum), n.; pl. arcula (-lä). [L., neut. dim. of arcus, a bow.] A small circular cushion used in antiquity by persons bearing weights on their heads, to int interpose between the head and the burden. Similar cushions are still in use. arcus (är'kus), n.; pl. arcus. [L., a bow, an arch, > E. arc1, ark1, arch1, q. v.] In an at., an arch, bow, or ring. Arcus adiposus, the arcus senilis. Arcus bicipital is, the bicipital arch; the tendinous arch through which the long head of the biceps muscle pa es. - Arcus neural is, the neural arch. See neural. - Arcus occipital is, a cerebral gyrus bounded above a by arcus pic a pita lis of the Intraparietaldred and embracing what may be regarded as the upper end of the second temporal fi ure. - Arcus pal a to glo us, the anterior pillar of the fauces, in front of the tonsil, formed by the pal a to glo us muscle and the mucous membrane covering it. Also called arcus pal at in us an terior. - Arcus palatopharyngeus, the posterior pillar of the fauces, behind the tonsil, formed by the palatopharyngeus muscle and the mucous membrane covering characters of the Arc to idea . it. called arcus pal at in us posterior . - Arcus senilis, the bow of old age; an opacity occurring in advanced age around the margin of the cornea. - Arcus superciliaris, outer toe not shorter than the inner, and moderately curved claws. The species are numerous, inhabiting nearly all parts of the world, but especially warm countries. Lead. arcus a horizontal ridge on the frontal bone, on either side, just above the orbit. - Arcus volar is, the superficial palmar arch.