TUF

abbreviation for

Calcareous tuf consists of similar incrustations made by petrifying rivulets running over mud, sand, vegetable remains, &c.

No substance is so favourable to nitrification as the natural stony concretion known under the name of lime-tuf.

Tuff, tuf, n. generally volcanic tuff, the name given to the comminuted rock-dbris ejected from a volcanic orifice.

Either the first letter may be accommodated to the second, tuf, or the second may be accommodated to the first, tupt.

Hence arises a process of accommodation by which the word becomes either tupt or tufth (tuf).

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