tuff

tuff

noun \ˈtəf\

Definition of TUFF

: a rock composed of the finer kinds of volcanic detritus usually fused together by heat

— tuff·a·ceous \ˌtə-ˈfā-shəs\ adjective

Origin of TUFF

earlier tuph, tuft porous rock, from Middle French tuf, from Old Italian tufo

First Known Use: 1815

Other Geology Terms

anthracite, boulder, cwm, erratic, igneous, intrusive, mesa, sedimentary, silt, swale

Rhymes with TUFF

bluff, buff, chough, chuff, cuff, duff, fluff, gruff, guff, huff, luff, muff, puff, rough, ruff, scruff, scuff, slough, snuff, sough, stuff, tough