see roc.-a distaff used in spinning; the staff or frame about which flax is arranged, and from which the thread is drawn in spinning.-a large concreted mass of stony material; a large fixed stone or crag. see stone.-any natural deposit forming a part of the earth's crust, whether consolidated or not, including sand, earth, clay, etc., when in natural beds.-that which resembles a rock in firmness; a defense; a support; a refuge.-fig.: anything which causes a disaster or wreck resembling the wreck of a vessel upon a rock.-the striped bass. see under bass.-to cause to sway backward and forward, as a body resting on a support beneath; as, to rock a cradle or chair; to cause to vibrate; to cause to reel or totter.-to move as in a cradle; hence, to put to sleep by rocking; to still; to quiet.-to move or be moved backward and forward; to be violently agitated; to reel; to totter.-to roll or saway backward and forward upon a support; as, to rock in a rocking-chair.