Source : Webster's Revised Unabridged Dictionary (1913)

Pleuron \Pleu"ron\, n.; pl. {Pleura}. [NL., fr. Gr. ? a rib.]
   (Zo["o]l.)
   (a) One of the sides of an animal.
   (b) One of the lateral pieces of a somite of an insect.
   (c) One of lateral processes of a somite of a crustacean.