ep·i·chil·i·um \ˌepəˈkilēəm\noun alsoep·i·chil\ˈepəˌkil\; orep·i·chile\ˈ ̷ ̷ ̷ ̷ˌkīl\ (pluralepichil·ia \ˌ ̷ ̷ ̷ ̷ˈkilēə\) Etymology: New Latin epichilium, from epi- + Greek cheilos lip + New Latin -ium : the terminal lobe of the labellum in some orchids