n. 1. One who rocks; specifically, one who rocks a cradle. [ 1913 Webster ]

It was I, sir, said the rocker, who had the honor, some thirty years since, to attend on your highness in your infancy. Fuller. [ 1913 Webster ]

2. One of the curving pieces of wood or metal on which a cradle, chair, etc., rocks. [ 1913 Webster ]

3. Any implement or machine working with a rocking motion, as a trough mounted on rockers for separating gold dust from gravel, etc., by agitation in water. [ 1913 Webster ]

4. A play horse on rockers; a rocking-horse. [ 1913 Webster ]

5. A chair mounted on rockers; a rocking-chair. [ 1913 Webster ]

6. A skate with a curved blade, somewhat resembling in shape the rocker of a cradle. [ 1913 Webster ]

7. (Mach.) Same as Rock shaft. [ 1913 Webster ]

Rocker arm (Mach.), an arm borne by a rock shaft. [ 1913 Webster ]

a. (Naut.) Shaped like a rocker; curved; as, a rockered keel. [ 1913 Webster ]

n. (Gardening) A mound formed of fragments of rock, earth, etc., and set with plants. [ 1913 Webster ]

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. ] [ 1913 Webster ]

An old cock pheasant came rocketing over me. H. R. Haggard. [ 1913 Webster ]

n. [ It. rocchetta, fr. rocca a distaff, of German origin. Named from the resemblance in shape to a distaff. See Rock a distaff. ] 1. An artificial firework consisting of a cylindrical case of paper or metal filled with a composition of combustible ingredients, as niter, charcoal, and sulphur, and fastened to a guiding stick. The rocket is projected through the air by the force arising from the expansion of the gases liberated by combustion of the composition. Rockets are used as projectiles for various purposes, for signals, and also for pyrotechnic display. [ 1913 Webster ]

2. A blunt lance head used in the joust. [ 1913 Webster ]

3. any flying device propelled by the reactive force of hot gases expelled in the direction opposite its motion. The fuel used to generate the expelled gases in rockets may be solid or liquid; rockets propelled by liquid fuels typically have a combustible fuel (such as hydrogen or kerosene) which is combined inside the rocket engine with an oxidizer, such as liquid oxygen. Single liquid fuels (called monopropellants) are also known. Since rocket engines do not depend on a surrounding fluid medium to generate their thrust, as do airplanes with propellers or jet engines, they may be used for propulsion in the vacuum of space. [ PJC ]

Congreve rocket, a powerful form of rocket for use in war, invented by Sir William Congreve. It may be used either in the field or for bombardment; in the former case, it is armed with shells or case shot; in the latter, with a combustible material inclosed in a metallic case, which is inextinguishable when kindled, and scatters its fire on every side. [ 1913 Webster ]

n. [ F. roquette (cf. Sp. ruqueta, It ruchetta), fr. L. eruca. ] (Bot.) (a) A cruciferous plant (Eruca sativa) sometimes eaten in Europe as a salad. (b) Damewort. (c) Rocket larkspur. See below. [ 1913 Webster ]

Dyer's Rocket. (Bot.) See Dyer's broom, under Broom. --
Rocket larkspur (Bot.), an annual plant with showy flowers in long racemes (Delphinium Ajacis). --
Sea rocket (Bot.), either of two fleshy cruciferous plants (Cakile maritima and Cakile Americana) found on the seashore of Europe and America. --
Yellow rocket (Bot.), a common cruciferous weed with yellow flowers (Barbarea vulgaris). [ 1913 Webster ]

n. (Sporting) A bird, especially a pheasant, which, being flushed, rises straight in the air like a rocket. [ Eng. ] [ 1913 Webster ]

n. a very intelligent person; -- used mostly in the phrases: “you don't have to be a rocket scientist to . . .” and “it doesn't take a rocket scientist to . . .”, meaning that the subject that follows is easy to understand. [ PJC ]