trisyllabic

tri- +‎ syllabic

• (General American, Received Pronunciation) IPA^(key): /ˌtɹaɪ.sɪˈlæb.ɪk/
• (General Australian) IPA^(key): /ˌtɹɑe.sɪˈlæb.ɪk/
• Rhymes: -æbɪk
• Hyphenation: tri‧syl‧lab‧ic

trisyllabic (not comparable)

1. having three syllables
   • 1980 January 20, Isaac Asimov, “A Cult of Ignorance”, in Newsweek, →ISSN, page 19:

     […] how many nonelitist Americans can, without undue difficulty, read as many as a thousand consecutive words of small print, some of which may be trisyllabic?

trisyllabic (plural trisyllabics)

1. a word comprising three syllables