rotacism

ro-tæ-form, a. [Lat. rota =a wheel, and form a =form.] Bot.: The same as ROTATE (q. v.). trō-tal, a. [Lat. rota =a wheel.] 1. Of or pertaining to wheels or vehicles. "The Cannabière is in a chronic state of vocal and rotal tumult."-G. A. Sala , in Illustrated London News, Nov. 5, 1881, p. 439. 2. Pertaining to circular or rotatory motion; rotary. 3498 chamber is inclosed by a complete wall of its own, and there are canal-like spaces between the two lamellæ forming each septum. The genus appears first in the Chalk, attaining its maximum in the Tertiary, and has many recent representatives. rō-ta-lid -ě-a, s. pl . [Mod. Lat. rotal ( ia ); Lat. neut. pl. adj. suff. -idea .] Zool. & Palæont .: An order of Lankester's Reticular i a (q. v.), section Per for at a. Test calcareous, perforate, free or adherent. Typically spiral and rotal i form. Aberrant forms evolute, outspread, acervuline, or irregular, some of the higher modifications with double chamber-walls, supplemental skeleton, and a system of canals. There are three families: Spirillinina, Rotal in a, and Tinoporina. Widely distributed in space; range in time from the Carboniferous onward. rō-tal-i-form, a . [Mod. Lat. rotal i ( a ), and Lat. form a shape.] Zool .: Coiled in such a manner that the whole of the segments are visible on the superior surface, those of the last convolution only on the inferior side, sometimes one face being more convex, sometimes the other. ( Encyc . Brit . (ed. 9th), xix. 847.) rō-ta-li-nạ, s . pl . [Mod. Latin rotal ( ia ); Latin neut. pl. adj. suff.- ina .] Zool. & Palæont .: The typical family of Rotal idea (q. v.), with numerous genera. Test spiral, rotal i form, rarely evolute, very rarely irregular or acervuline. From the Carboniferous onward. rō-ta-line, a. & 8. [ROTAL IN A.] A. As adj.: Belonging to or characteristic of the family Rotal in a. ( Nicholson.) B. As subst.: Any individual of the family Rotal in a (q. v.). "One of the earliest representatives of the Rota lines ." -Nicholson: Palæont., i. 116. rō-ta-rỹ, a . [As if from a Latin rotarius , from rota a wheel; cognate with Gael. or Irish roth ; Welsh rhod; Ger.rad = a wheel.] Having a motion on its axis, as a wheel; pertaining to rotation; rotatory. rotary-battery, s. Metall.: A stamping battery for crushing ores. The stamps are arranged circularly around a vertical shaft, which carries around an inclined plane that rises and lets fall each stamp in succe ion. rotary-blower, s. A form of blower in which the blast of air is obtained by the rotation of a pis ton or pistons, or of a fan. rotary-cutter, s. 1. Metall .: A toothed disc on a mandrel, between the centers of a lathe. Used in cutting gears, milling, . 2. Wood: A cutting head in a planing-machine. rotary-engine, s. A form of steam-engine in which the piston rotates in the cylinder or the cylinder upon the piston. The varieties are numerous, but, in practice, rotary engines are not found to be any more economical than the reciprocating engine with crank attached.