grapholite

== English == === Etymology === From grapho- +‎ -lite, from Ancient Greek γράφειν (gráphein, “writε”) and λίθος (líthos, “stone”). === Noun === grapholite (countable and uncountable, plural grapholites) Any variety of slate suitable to be written on. === References === “grapholite”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.