Толковый словарь английского языка - chalk

I. noun Etymology: Middle English, from Old English cealc, from Latin calc-, calx lime; akin to Greek chalix pebble Date: before 12th century 1. a soft white, gray, or buff limestone composed chiefly of the shells of foraminifers, a prepared form of ~ or a material resembling ~ especially when used (as for writing on blackboards) as a crayon, 2. a mark made with ~, a point scored in a game, ~y adjective II. verb Date: 1580 transitive verb to write or draw with ~, to rub or mark with ~ , 3. to delineate roughly ; sketch , to set down or add up with or as if with ~ ; record, intransitive verb to become ~y