graystone

== English == === Alternative forms === greystone (mostly UK) === Etymology === From gray +‎ stone. === Noun === graystone (countable and uncountable, plural graystones) (uncountable) A type of gray volcanic rock, typically containing feldspar and iron. (uncountable, attributive) Any type of gray stone, such as limestone, used in building. (countable, by extension) A building of this kind. ==== Related terms ==== brownstone === Anagrams === astrogeny