n. In tin-mining, the washing of tin ore from the detritus with which it is associated.n. In biology, the peculiar flowing motion of the particles of protoplasm in an amœba or other rhizopod, by which the form of the animalcule changes or pseudopods are protruded; also, the similar circulation or rotation of the protoplasm of some plant-cells. See protoplasm, and rotation of protoplasm (under rotation).In heraldry, issuing, as rays of light: as, rays streaming from the dexter chief.