cymatograph

== English == === Etymology === From Latin cȳmat(is) (“sprout, swelling, hollow sphere”) + -o- +‎ -graph, stem of cȳma, from Ancient Greek κῡ́μᾰτος (kū́mătos, “wave, billow, swell, sprout, fetus”), genitive of κῦμα (kûma). Compare cymograph. === Pronunciation === (Received Pronunciation) enPR: sīmăʹtōgräf, sīmăʹtōgrăf; IPA(key): /saɪˈmætəʊɡɹɑːf/, /saɪˈmætəʊɡɹæf/ === Noun === cymatograph (plural cymatographs) (obsolete, rare) An instrument for compounding the resultant of two parallel, simple, harmonic waves.