We found one dictionary that defines the word polysyllabic words:

General (1 matching dictionary)

1. polysyllabic words: Vocabulary.com

(Note: See polysyllabic_word as well.)

Definitions from WordNet (polysyllabic word) ▸ noun:  a word of more than three syllables ▸ Also see polysyllabic_word ▸ Words similar to polysyllabic words ▸ Usage examples for polysyllabic words ▸ Idioms related to polysyllabic words ▸ Wikipedia articles (New!) ▸ Words that often appear near polysyllabic words ▸ Rhymes of polysyllabic words ▸ Invented words related to polysyllabic words