IPA: /ˌeɪ.kəˈtæl.ɛk.tɪk/
KK: /ˌeɪ.kəˈtæl.ɛk.tɪk/
This word describes a type of verse that has a complete and regular pattern, meaning it includes all the expected syllables in its final part.
The poem was acatalectic, showcasing a perfect rhythm throughout its lines.
Acatalectic is formed from "a-" (meaning without) and "catalectic" (from Greek "katalektikos", meaning incomplete or lacking). The term refers to a line of verse that is complete, without any missing syllables, hence it is 'without' incompleteness.
Think of 'without' ('a-') any 'incompleteness' ('catalectic') in a line of poetry — that's what acatalectic means.