IPA: /ˈhɛp.təˌmɛt.ər/
KK: /ˈhɛp.təˌmɛt.ər/
A line of poetry that has seven units of rhythm or beats.
The poem was written in heptameter, giving it a unique flow and rhythm.
Heptameter → It is formed from "hepta-" (from Greek "heptá", meaning seven) and "metron" (meaning measure). The word refers to a line of verse consisting of seven metrical feet.
Think of 'hepta-' meaning seven, and 'metron' meaning measure — so a heptameter is a measure of seven feet in poetry.