| 释义 |
tuff
tuff T0288400 (tŭf)n. A rock composed of compacted volcanic ash varying in size from fine sand to coarse gravel.
[French tuf, from Old French, from Old Italian tufo, tufa; see tufa.]
tuff·a′ceous (tŭ-fā′shəs) adj.tuff (tʌf) n (Geological Science) a rock formed by the fusing together on the ground of small rock fragments (less than 2 mm across) ejected from a volcano[C16: from Old French tuf, from Italian tufo; see tufa] tuffaceous adjtuff (tʌf)
n. a fragmental rock consisting of the smaller kinds of volcanic detritus, as ash or cinder, usu. more or less stratified. [1560–70; < Middle French tuf(e) < Italian tufo. See tufa] tuff•a′ceous, adj. tuff (tŭf) A rock made up of particles of volcanic ash, varying in size from fine sand to coarse gravel.tuffA rock made up of compacted volcanic ash; also known as tufa.Thesaurus| Noun | 1. |  tuff - hard volcanic rock composed of compacted volcanic ashtufavolcanic rock - extrusive igneous rock solidified near or on the surface of the Earth |
tuff
tuff a rock formed by the fusing together on the ground of small rock fragments (less than 2 mm across) ejected from a volcano tuff[təf] (geology) Consolidated volcanic ash, composed largely of fragments (less than 4 millimeters) produced directly by volcanic eruption; much of the fragmented material represents finely comminuted crystals and rocks. tuff, volcanic tuffA low-density, high-porosity rock; composed of volcanic particles, ranging from ash size to small pebble size, which are compacted or cemented together; sometimes used as building stone or as a thermal insulation material.TUFF
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tuff
Related to tuff: toughSynonyms for tuffnoun hard volcanic rock composed of compacted volcanic ashSynonymsRelated Words |