bas i branchial (basibrang kial)

and n. [ IMG:content-1719.png:[ocr errors] I. a . Pertaining bony IMG:content-1720.png:[ocr errors] gills or branchise, or to the corresponding vis ceral arches of abranchiate vertebrates. II. n. A bone or cartilage forming the base of a branchia, gill-arch, or visceral arch. In birds, the bas i branchial is the single median piece of the hyoid apparatus usually called urohyal . In typical fishes there are three bas i branch i als in a longitudinal row, beneath the foremost of which is the urohyal, and in front the glo ohyal. basic (bā'sik), a. [ base2 + -ic.] 1. Relating to a base; of the nature of a base; fundamental. This basic principle runs through the literature of the past from the days of the Zend Avesta. N. A. Rev., CXLIII. 373. 2. In chem.: (a) Performing the office of a base in a salt. (b) Having the base in exce ; having more than one equivalent each equivalent of acid.-3. In geol., contain equivalent of the base for ing a relatively small amount of silica: applied ied to crystalline rocks, as basalt: opposed to acidic.-4. In an at., basal; basilar.- Basic alum. See alum. - Basic blue. See blue. - Basic line, in the spectrum, a name given by Lockyer to those lines in the spectrum of an element which, as the spectrum changes under increase of temperature, become more conspicuous while the others disappear. Certain of these lines being common to the spectra of two substances ( e. g., cadmium and iron), it is inferred that they may belong to a common element present in both and liberated at the highest temperature.- Basic lining, a lining fitted to the interior of a Be emer converter, having a tendency to absorb the phosphorus in the melted metal. - Basic proce , a proce of making steel or homogeneous iron, consisting in introducing into the lining composition of the Be emer converter and into the charges lime other earthy base, 465 (considered to represent an exopodite) and ischiocerite. See Pod ophthalmia . basicity (bā-sis'i-ti), n. [ Another way in which acids may be cla ified has reference to their basicity : they may be divided into monobasic, dibasic, and tribasic acids. H. Watts , Dict. of Chem., I. 46. basicranial (bā-si-krā'ni-al), a. [L. basis , a base, + NL. cranium + -al .] Pertaining to the base of the skull. - Basicranial axis. See axis1 . basidia, n. Plural of basidium . bas i (bā-si-dij'i-tal), a. [L. basis , a base, + digit us , finger, + -al .] In an at ., of or pertaining to the bases of the digits: applied to the metacarpal and metatarsal bones. Each digit has a proximal bas i - ... bone, upon which follows a linear series of phalanges. Huxley , Anat. Vert., p. 31. bas i digit ale (bā"si-dij-i-tā'lē), n.; pl. basidigi tali a (-li-a). [NL.: see bas i .] One of the bas i bones; a metacarpal or meta tarsal bone. IMG:content-1721.png:[blocks in formation] basidium (bāsid'i-um), n.; a, basidium of Clathrus can cell at us; b, of pl. basidia (-a). Agaric us; c, of Lycoperdon cep a for me. [NL., dim. of Gr. βάσις, a base.] In bot., an enlarged cell in basidiomycetous fungi, arising from the hymenium, and producing by abstriction spores borne upon slender projections at its summit.