from The American Heritage® Dictionary of the English Language, 4th Edition
- n. The calcareous and siliceous rock deposits of springs, lakes, or ground water.
- n. See tuff.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. the calcareous deposit of lime found near hot springs
- n. the volcanic rock tuff
from the GNU version of the Collaborative International Dictionary of English
- 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.
from The Century Dictionary and Cyclopedia
- n. A rock having a rough or cellular texture, sometimes a fragmental volcanic material, and sometimes a calcareous deposit from springs.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. hard volcanic rock composed of compacted volcanic ash
- n. a soft porous rock consisting of calcium carbonate deposited from springs rich in lime
A dull gray, local stone called tufa forms the Surgeon's unimpressive impluvium, while black-and-white mosaic flooring seems to be restricted to two rooms: the tablinum and a cubiculum.
People sometimes call it tufa, like those stones you see in fish tanks.
It's not actually known what Edwin's symbol was Bede says he used a Roman-style standard called a tufa but doesn't describe it.
Prodigious quantities of ashes and cinders were discharged from the craters; and these, deposited and hardened by long pressure under water, formed the reddish-brown earthy rock called tufa, of which the seven hills of Rome are composed.
It will have to fight against the sand that slips and gradually fills up the small amount of empty space obtained; it will perhaps, without crowbar or pickaxe, have to cut itself a gallery through something tantamount to tufa, that is to say, through earth which a shower has rendered compact.
The etymology of Latin tofus 'tufa' isn't written ...
Paleoglot: The etymology of Latin tofus 'tufa' isn't written in stone skip to main
The etymology of Latin tofus 'tufa' isn't written in stone
Heracl.1.137, then further suggested that it be traced to Latin tōfus 'tufa' which in turn was stated to probably come from an Italic dialect.
But he mentioned, with evident pride, that he differed from all the scientific people who had visited the spot; and he flung about such words as "tufa" and "scilica" with careless freedom.