rolling tackle (roʻlingtak"l)

A tackle used to steady a yard when the ship rolls heavily. It is hooked to the weather-quarter of the yard and to a strap around the mast, and hauled taut. Also called rolling-rope. Roll in i a (ro-lin'i-ä), n. [NL. (A. St. Hilaire, 1825), named after Charles Rollin (1661-1741), a French historian, who aided the botanist Tournefort in his work the "Institutiones."] A genus of trees and shrubs of the order Anona ceæ, the custard-apple family, and of the tribe Xylopieæ. It is characterized by its globose corolla with six lobes in two series, the three outer concave at the base and produced into a thick, laterally flattened dorsal wing, the three inner small, sometimes minute or obsolete. It is readily distinguished from the next related genus, Anona, the custard-apple, by its append aged petals. There are about 20 species, all natives of warmer parts of America. They bear either thin or rigid leaves, and flowers in small clusters which are either terminal or opposite the leaves. The fruit is composed of many se ile berries borne on a broad convex receptacle, either separate or more often united into one roundish and many-celled fruit. R. mul tiflora and R. long i folia furnish a light tough wood, a kind of lancewood. R. Sieberi is called sugar - apple in the West Indies. roll-joint (rõl joint), n. 1. A method of joining metal sheets by rolling one edge over the other and pre ing the joining flat. - 2. A joint made by this method. roll-lathe (rollāh), n. In mach ., a lathe for turning off ma ive rolls for rolling-mills, cal end ering-machines, etc. The centers are relieved from strain in such lathes by rests which support the journals of the rolls during the proce . See roll . roll-molding (rol'molding), n. (rol'ok), n. Same as rowlock. roll-top (rol'top), a. Having a rolling top.Roll-top desk. Same as cylinder - desk. roll-train (rol'trān), n. A rolling-mill train. See rolling - mill and train. Rollulidæ (ro-lūʻli-dē), n. pl. [NL.,