undulatory theory undulatory • undull · · · Info · Definitions · Synonyms · Characters · · undulatory theory · · Text Common · · Latin · · Scripts 17 · · Length 8 · · Syllables Definitions · · · (noun) (physics) the theory that light is transmitted as waves. Synonyms: wave theory, undulatory theory, wave theory of light. · · Noun Definition 1 Synonyms · · · wave theory · · Synonym 1 wave theory of light · · Synonym 2 Characters · · space U+0020 a latin small letter a U+0061 d latin small letter d U+0064 e latin small letter e U+0065 h latin small letter h U+0068 l latin small letter l U+006C n latin small letter n U+006E o latin small letter o U+006F r latin small letter r U+0072 t latin small letter t U+0074 u latin small letter u U+0075 y latin small letter y U+0079