Definition of pentamerism in English:

pentamerism

noun

Botany Zoology
rare
  • Pentamery.

Origin

Early 20th century; earliest use found in Ray Lankester (1847–1929), zoologist. From penta- + -merism, after pentamerous.

Pronunciation

pentamerism

/pɛnˈtamərɪz(ə)m/