Rubigo, rōō-bī′gō, n. a kind of rust on plants: mildew.—adjs. Rubig′inose, brown-red; Rubig′inous. [L., rust.]
Rubine, rōō′bin, n. an aniline dye.—adj. Rubin′eous, of a glassy semi-transparent crimson. [L. rubeus, red.]
Rubiretin, rōō-bi-ret′in, n. a resinous colouring matter in madder. [L. rubeus, red, Gr. hrētinē, resin.]
Ruble, Rouble, rōō′bl, n. the unit of the Russian money system, divided into 100 copecks—the present silver ruble is equivalent to 2s. 1½d. [Russ. rublĭ—rubitĭ, cut off, prob. from Pers. rūpīya, a rupee.]
Rubric, rōō′brik, n. the directions for the service, in office-books, formerly in red letters: any heading, guiding, rule, &c. printed conspicuously in red: a flourish after a signature: a thing definitely settled: red ochre.—v.t. to enjoin services.—adjs. Ru′bric, -al, agreeing with a rubric.—adv. Ru′brically, over formally.—v.t. Ru′bricate, to illuminate with red letters: to formulate as a rubric.—adj. represented in red.—ns. Rubricā′tion, that which is illuminated; Rubricā′tor, one who rubricates; Rubric′ian, one versed in the rubric; Rubric′ity, accordance with the rubric.—adj. Ru′bricose (bot.), marked with red.—n. Ru′brisher (obs.), a painter of ornamental letters in early manuscripts. [L. rubrica, red earth—ruber, red.]
Rubus, rōō′bus, n. a genus of rosaceous plants including the raspberry, &c. [L., a bramble-bush.]
Ruby, rōō′bi, n. a pure transparent red-coloured corundum, inferior in hardness to the diamond only among gems: redness, anything red: (her.) the tincture red or gules: (print.) a type smaller than nonpareil and larger than pearl—5½ points in the new system: the red bird of Paradise: the ruby hummer of Brazil.—adj. red.—v.t. to make red:—pa.t. and pa.p. ru′bied.—adj. Ru′bied (Shak.), red as a ruby.—n. Ru′bine (Spens.), same as Ruby.—adj. Ru′bious (Shak.), ruby, red, ruddy.—ns. Ru′by-blende, a clear red variety of zinc sulphide: ruby silver; Ru′by-tail, a gold-wasp, or cuckoo-fly.—adj. Ru′by-throat′ed, like a humming-bird, with a ruby gorget.—ns. Ru′by-tī′ger, a British moth; Ru′by-wood, red sandalwood.—Rock ruby, a ruby-red garnet. [O. Fr. rubi—L. rubeus—ruber, red.]
Rucervus, rōō-ser′vus, n. a genus of East Indian Cervidæ.—adj. Rucer′vine.
Ruche, rōōsh, n. a plaited frilling.—Also Ruch′ing. [Fr., prob. Celt., Bret. rusk.]
Ruck, ruk, n. a wrinkle, fold, or crease.—v.t. to wrinkle, to crease: to annoy, ruffle.—v.i. to have a folded, wrinkled, or ridgy surface. [Ice. hrukka, a wrinkle.]