Found 1 items, similar to terras.
English → English (gcide) Definition: terras Trass \Trass\, n. [D. tras or Gr. trass, probably fr. It. terrazzo terrace. See Terrace.] (Geol.) A white to gray volcanic tufa, formed of decomposed trachytic cinders; -- sometimes used as a cement. Hence, a coarse sort of plaster or mortar, durable in water, and used to line cisterns and other reservoirs of water. [Formerly written also tarras, tarrace, terras.] [1913 Webster] Note: The Dutch trass is made by burning and grinding a soft grayish rock found on the lower Rhine. [1913 Webster]