Obs. [f. L. Tibur, a town of ancient Italy: cf. L. lapis Tīburtīnus.] A calcareous stone quarried at Tibur, now Tivoli; travertine: cf. TIBURTINE.
1726. Leoni, Alberti’s Archit., I. 58/2. One fourth part of Tyber-Stone, bent to powder.
