hyalograph

== English == === Etymology === From hyalo- +‎ -graph. === Noun === hyalograph (plural hyalographs) (obsolete) An instrument for tracing designs on glass. ==== Related terms ==== hyalography === References === “hyalograph”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.