† tiber-, tyber-stoneObs. [f. L. Tibur, a town of ancient Italy: cf. L. lapis Tīburtīnus.] A calcareous stone quarried at Tibur, now Tivoli; travertine: cf. tiburtine. 1726Leoni Alberti's Archit. I. 58/2 One fourth part of Tyber-Stone, beat to powder.