PLEURON Meaning of PLEURON in English /ploor"on/ , n. , pl. pleura /ploor"euh/ . Entomol.the lateral plate or plates of a thoracic segment of an insect. [ 1700-10; pleurón rib, (pl.) side ] Random House Webster's Unabridged English dictionary. Полный английский словарь Вебстер - Random House . 2012