Pleuron

from The Collaborative International Dictionary of English v.0.48

Pleuron \Pleu"ron\, n.; pl. {Pleura}. [NL., fr. Gr. ? a rib.]
   (Zool.)
   (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.
       [1913 Webster]