a. rare. [f. L. type *terrāce-us (see TERRACE) + -OUS: cf. -ACEOUS.] Of earthy nature or composition.
1771. Raspe, trans. Ferber’s Trav. Italy, 1771–2 (1776), viii. 89. An indurated terraceous substance, striated and similar to what they call erzmutter, or ore matrix, in Hungary.
1863. Mouat, Adv. Andaman Island., 151. The progress that we made through the terraceous compost was necessarily slow.
