EpisternumPronunciation/eh-pis-ter-num/CategoryAnatomySingularEpisternumPluralEpisternaDefinitionThe anterior-most sclerite of the thoracic pleuron.EtymologyFrom Greek 'epi-', meaning 'upon', and 'sternon', meaning 'breastbone'.ExampleThe episternum is located on the thorax of insects.Related TermsThoraxPleuron