WordReference Random House Unabridged Dictionary of American English © 2026
pen•ta•syl•la•ble
(pen′tə sil′ə bəl),USA pronunciation n.
pen•ta•syl•lab•ic
(pen′tə si lab′ik),USA pronunciation adj.
pen′ta•syl′la•bism, n.
- Linguistics, Poetrya word or line of verse of five syllables.
- 1810–20; penta- + syllable