trass

noun

ˈtras

variants or less commonly terrace or tarras

təˈras

plural trasses also terraces or tarrases

: a light-colored volcanic tuff resembling pozzolana in composition and occurring especially on the lower Rhine where it is ground for use in a hydraulic cement

Word History

Etymology

Dutch trass, terras, from French terrasse pile of earth, terrace, from Middle French

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