Search Result for "terras": 
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2 definitions retrieved:

The Collaborative International Dictionary of English v.0.48:

Terras \Ter"ras\, n. (Min.) See ?rass. [1913 Webster]
The Collaborative International Dictionary of English v.0.48:

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]