Rocking shaft. (Mach.) See Rock shaft.

(Rock"ing-chair`) n. A chair mounted on rockers, in which one may rock.

(Rock"ing-horse`) n. The figure of a horse, mounted upon rockers, for children to ride.

(Rock"ing-stone`) n. A stone, often of great size and weight, resting upon another stone, and so exactly poised that it can be rocked, or slightly moved, with but little force.

(Rock"less), a. Being without rocks. Dryden.

(Rock"ling) n. (Zoöl.) Any species of small marine fishes of the genera Onos and Rhinonemus allied to the cod. They have three or four barbels.

(Rock"rose`) n. (Bot.) A name given to any species of the genus Helianthemum, low shrubs or herbs with yellow flowers, especially the European H. vulgare and the American frostweed, H. Canadense.

Cretan rockrose, a related shrub (Cistus Creticus), one of the plants yielding the fragrant gum called ladanum.

Rock shaft
(Rock" shaft`) [Cf. Rock, v. i.] (Mach.) A shaft that oscillates on its journals, instead of revolving, — usually carrying levers by means of which it receives and communicates reciprocating motion, as in the valve gear of some steam engines; — called also rocker, rocking shaft, and way shaft.

Rock staff
(Rock" staff`) [Cf. Rock, v. i.] An oscillating bar in a machine, as the lever of the bellows of a forge.

(Rock"suck`er) n. (Zoöl.) A lamprey.

(Rock"weed`) n. (Bot.) Any coarse seaweed growing on sea-washed rocks, especially Fucus.

(Rock"wood`) n. (Min.) Ligniform asbestus; also, fossil wood.

(Rock"work`) n.

latter, with a combustible material inclosed in a metallic case, which is inextinguishable when kindled, and scatters its fire on every side.

(Rock"et), v. i. [imp. & p. p. Rocketed; p. pr. & vb. n. Rocketing.] (Sporting) To rise straight up; said of birds; usually in the present participle or as an adjective. [Eng.]

An old cock pheasant came rocketing over me.
H. R. Haggard.

(Rock"et*er) n. (Sporting) A bird, especially a pheasant, which, being flushed, rises straight in the air like a rocket. [Eng.]

(Rock"fish`) n. (Zoöl.) (a) Any one of several California scorpænoid food fishes of the genus Sebastichthys, as the red rockfish They are among the most important of California market fishes. Called also rock cod, and garrupa. (b) The striped bass. See Bass. (c) Any one of several species of Florida and Bermuda groupers of the genus Epinephelus. (d) An American fresh- water darter; the log perch.

The term is locally applied to various other fishes.

(Rock"i*ness) n. [From Rocky.] The state or quality of being rocky.

(Rock"ing), a. Having a swaying, rolling, or back-and-forth movement; used for rocking.

  By PanEris using Melati.

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