sine wave sine qua non • sine-qua-nonical · · · Info · Definitions · Characters · · sine wave · · Text Common · · Latin · · Scripts 9 · · Length 2 · · Syllables Definitions · · · (noun) a wave whose waveform resembles a sine curve. Synonyms: sine wave. · · Noun Definition 1 Characters · · space U+0020 a latin small letter a U+0061 e latin small letter e U+0065 i latin small letter i U+0069 n latin small letter n U+006E s latin small letter s U+0073 v latin small letter v U+0076 w latin small letter w U+0077