The Collaborative International Dictionary
                    Epimeron
                    
                        
                
                                                                    Epimeron \E*pim"e*ron\, n.; pl. Epimera. [NL., fr. Gr. 'epi` upon + ? a part.] (Zo["o]l.)
- In crustaceans: The part of the side of a somite external to the basal joint of each appendage. See Illust. under Crustacea. 
- In insects: The lateral piece behind the episternum. 
Wiktionary
                    epimeron
                    
                        
                
                                                                    n. 1 (context zoology English) In crustaceans, the part of the side of a somite external to the basal joint of each appendage. 2 (context zoology English) In insects, the lateral piece behind the episternum.