ROCK n.
bird, rock plover, winter snipe. -- Rock soap (Min.), a kind of clay having a smooth, greasy feel, and adhering to the tongue. -- Rock sparrow. (Zoöl.) (a) Any one of several species of Old World sparrows of the genus Petronia, as P. stulla, of Europe. (b) A North American sparrow (Pucæa ruficeps). -- Rock tar, pet…