trisyllable

[ trahy-sil-uh-buh l, trahy-sil-, tri- ]

/ ˈtraɪˌsɪl ə bəl, traɪˈsɪl-, trɪ- /

a word of three syllables, as pendulum.

Origin of trisyllable

1580–90; tri- + syllable, modeled on Greek trisýllabos having three syllables

tri·syl·lab·ic

[trahy-si-lab-ik, tris-i-] /ˌtraɪ sɪˈlæb ɪk, ˌtrɪs ɪ-/, tri·syl·lab·i·cal, adjective tri·syl·lab·i·cal·ly, adverb tri·syl·lab·ism, noun

Each line ends with a trisyllable or a tetrasyllable, with dissyllabic rhyme running through the quatrain.

The Latin & Irish Lives of Ciaran |Anonymous
Trisyllable, trī-, or tri-sil′a-bl, n. a word of three syllables.

Chambers's Twentieth Century Dictionary (part 4 of 4: S-Z and supplements) |Various
Unless we are to pronounce this as a trisyllable a word must have dropped out of this line.

The Works of Aphra Behn, Volume VI |Aphra Behn
Decasyllabic Verse: A verse of ten syllables may be formed by the triple repetition of the trisyllable — — /.

Legends, Tales and Poems |Gustavo Adolfo Becquer

We must either make the form variable, or else treat the word de-y-nous as a trisyllable.

Chaucer's Works, Volume 5 (of 7) -- Notes to the Canterbury Tales |Geoffrey Chaucer

trisyllable

/ (traɪˈsɪləbəl) /

a word of three syllables

trisyllabic (ˌtraɪsɪˈlæbɪk), adjective trisyllabically, adverb