American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "tufa" in a sentence
"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."