Part 469

Ru*then"ic (?), a. (Chem.) Pertaining to, or containing, ruthenium; specifically, designating those compounds in which it has a higher valence as contrasted with ruthenious compounds.

Ru*the"ni*ous (?), a. (Chem.) Pertaining to, or containing, ruthenium; specifically, designating those compounds in which it has a lower valence as contrasted with ruthenic compounds.

Ru*the"ni*um (?), n. [NL. So named from the Ruthenians, a Little Russian people, as coming from Russia, the metal having been found in the Ural mountains.] (Chem.) A rare element of the light platinum group, found associated with platinum ores, and isolated as a hard, brittle steel-gray metal which is very infusible. Symbol Ru. Atomic weight 103.5. Specific gravity 12.26. See Platinum metals, under Platinum.

Ruth"ful (?), a. Full of ruth; as: (a) Pitiful; tender. (b) Full of sorrow; woeful. (c) Causing sorrow. Shak. -- Ruth"ful*ly, adv.

Ruth"less, a. Having no ruth; cruel; pitiless.

Their rage the hostile bands restrain, All but the ruthless monarch of the main.

Pope.

-- Ruth"less*ly, adv. -- Ruth"less*ness, n.

Ru"tic (r"tk), a. [Cf. Rutaceous.] (Chem.) Pertaining to, or obtained from, rue (Ruta); as, rutic acid, now commonly called capric acid.

Ru"ti*lant (&?;), a. [L. rutilans, p. pr. of rutilare to have a reddish glow, fr. rutilus red: cf. F. rutilant.] Having a reddish glow; shining.

Parchments . . . colored with this rutilant mixture.

Evelyn.

Ru"ti*late (?), v. i. [L. rutilare, rutilatum.] To shine; to emit rays of light. [Obs.] Ure.

Ru"tile (r"tl), n. [L. rutilus red, inclining to golden yellow.] (Min.) A mineral usually of a reddish brown color, and brilliant metallic adamantine luster, occurring in tetragonal crystals. In composition it is titanium dioxide, like octahedrite and brookite.

Ru*til"i*an (r*tl"*an), n. (Zoöl.) Any species of lamellicorn beetles belonging to Rutila and allied genera, as the spotted grapevine beetle (Pelidnota punctata).

Ru"tin (r"tn), n. (Chem.) A glucoside resembling, but distinct from, quercitrin. Rutin is found in the leaves of the rue (Ruta graveolens) and other plants, and obtained as a bitter yellow crystalline substance which yields quercitin on decomposition.

Rut"ter (rt"tr), n. [D. ruiter a rider. Cf. Ruttier.] A horseman or trooper. [Obs.]

Such a regiment of rutters Never defied men braver.

Beau. & Fl.

Rut"ter, n. [From Rut.] That which ruts.

Rut"ter*kin (?), n. An old crafty fox or beguiler -- a word of contempt. [Obs.] Cotgrave.

Rut"ti*er (?), n. [F. routier, fr. route a road. See Route.] A chart of a course, esp. at sea. [Obs.]

Rut"tish (?), a. Inclined to rut; lustful; libidinous; salacious. Shak. -- Rut"tish*ness, n.

Rut"tle, n. A rattling sound in the throat arising from difficulty of breathing; a rattle. [Obs.]

Rut"ty (?), a. Ruttish; lustful.

Rut"ty, a. Full of ruts; as, a rutty road.

Rut"ty, a. [See Root.] Rooty. [Obs.] Spenser.

Ru"ty*lene (?), n. (Chem.) A liquid hydrocarbon, C10H18, of the acetylene series. It is produced artificially.