Definition of pleon in English:

pleon

noun

Zoology
  • The posterior division of the body of a crustacean; the crustacean abdomen.

Origin

Mid 19th century. From ancient Greek πλέων, present participle of πλεῖν to swim, to sail from the same Indo-European base as Sanskrit plavate he floats, swims, Old Church Slavonic plavati, Russian plavat′ to swim.

Pronunciation

pleon

/ˈpliːɒn//ˈpliːən/