Defn: 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.
ROCKLESS
Rock"less, a.
Defn: Being without rocks. Dryden.
ROCKLING
Rock"ling, n. (Zoöl.)
Defn: Any species of small marine fishes of the genera Onos and Rhinonemus (formerly Motella), allied to the cod. They have three or four barbels.
ROCKROSE
Rock"rose`, n. (Bot.)
Defn: 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`. Etym: [Cf. Rock, v. i.] (Mach.)
Defn: 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`. Etym: [Cf. Rock, v. i.]