- Rhymes: -æbɪk
polysyllabic (not comparable)
- (of a word) Having more than one syllable; having multiple or many syllables.
- "Antidisestablishmentarianism" definitely qualifies as a polysyllabic word.
- ‘Polysyllabic’ is a polysyllabic word.
- (of spoken or written language) Characterized by or consisting of words having numerous syllables.
- I have a particularly off-putting predilection for the utilization of ponderously polysyllabic linguistic constructions.
Usage notes 
Authoritative sources disagree concerning the precise number of syllables needed for a word to count as polysyllabic. The references cited below variously stipulate anywhere from more than one syllable to four or more. In general usage, a polysyllabic word is a word which is regarded as lengthy and polysyllabic writing or speech is often regarded as elaborate, overly lengthy, or excessively complex.
- (of a word): multisyllabic
Related terms 
polysyllabic (plural polysyllabics)
- “polysyllabic” in Dictionary.com Unabridged, v1.0.1, Lexico Publishing Group, 2006.
- "polysyllabic" in Encarta® World English Dictionary [North American Edition] © & (P)2007 Microsoft Corporation.
- "polysyllabic" in Cambridge Advanced Learner's Dictionary © Cambridge University Press 2007.
- "polysyllabic" in Compact Oxford English Dictionary, © Oxford University Press, 2007.
- Random House Webster's Unabridged Electronic Dictionary, 1987-1996.
- Oxford English Dictionary, 2nd ed., 1989.