·p.pr. & ·vb.n. of Rock.
II. Rocking ·adj Having a swaying, rolling, or back-and-forth movement; used for rocking.
·noun A chair mounted on rockers, in which one may rock. ...
Webster's Dictionary of the English Language
·noun The figure of a horse, mounted upon rockers, for children to ride. ...
·noun A stone, often of great size and weight, resting upon another stone, and so exactly poised tha...