polysyllable

A word of more than two and usually more than three syllables.

A word of several syllables; usually, a word of four or more syllables, words of one syllable being called monosyllables, those of two dissyllables, and those of three trisyllables.

A word of many syllables, or consisting of more syllables than three; — words of less than four syllables being called monosyllables, dissyllables, and trisyllables.

A word with more than two syllables. Sometimes used in a more restricted sense.

a word of more than three syllables