IPA: /ˈtraɪˌmiːtə/
KK: /ˈtraɪˌmiːtər/
A type of line in poetry that has three sections, each with a specific rhythm or pattern of beats.
The poem was written in trimeter, giving it a unique rhythm and flow.
Trimeter is formed from "tri-" (meaning three) and "metron" (meaning measure). The word refers to a line of verse consisting of three metrical feet, thus measuring three units of rhythm.
Think of 'tri-' meaning three and 'metron' meaning measure — a trimeter is a measure of three rhythmic units.