tuff 
(tŭf)
(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·aceous (tŭ-fāshəs) adj.
| 单词 | tuff |
| 释义 | tuff (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·aceous (tŭ-fāshəs) adj. |
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