tuff, tufa
(noun) hard volcanic rock composed of compacted volcanic ash
tufa, calc-tufa
(noun) a soft porous rock consisting of calcium carbonate deposited from springs rich in lime
Source: WordNet® 3.1
tufa (countable and uncountable, plural tufas)
Calcareous lime deposited by precipitation from a body of water, such as a hot spring.
(rock) A variety of volcanic rock, tuff.
Synonym: tuff
• (calcareous deposit): calcite, limestone
• FUTA, UFTA, futa
Source: Wiktionary
Tu"fa, Etym: [It. fufo soft, sandy stone, L. tofus, tophus. Cf. Tofus, Toph, and Tophin.] (Min.) (a) A soft or porous stone formed by depositions from water, usually calcareous; -- called also calcareous tufa. (b) A friable volcanic rock or conglomerate, formed of consolidated cinders, or scoria.
Source: Webster’s Unabridged Dictionary 1913 Edition
9 May 2025
(noun) anything in accord with principles of justice; “he feels he is in the right”; “the rightfulness of his claim”
Contrary to popular belief, coffee beans are not technically beans. They are referred to as such because of their resemblance to legumes. A coffee bean is a seed of the Coffea plant and the source for coffee. It is the pit inside the red or purple fruit, often referred to as a cherry. Just like ordinary cherries, the coffee fruit is also a so-called stone fruit.
