| tufa | <chemical> A soft or porous stone formed by depositions from water, usually calcareous; called also calcareous tufa. A friable volcanic rock or conglomerate, formed of consolidated cinders, or scoria. Origin: It. Fufo soft, sandy stone, L. Tofus, tophus. Cf. Tofus, Toph, and Tophin. Source: Websters Dictionary (01 Mar 1998) |
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| tufaceous | <chemical> Pertaining to tufa; consisting of, or resembling, tufa. Origin: Cf. It. Tufaceo, L. Tofaceus, tofacius. See Tufa. Source: Websters Dictionary (01 Mar 1998) |