scleritePronunciation: /ˈsklɪərʌɪt, ˈsklɛ-/Definition of sclerite noun Zoology a component section of an exoskeleton, especially each of the plates forming the skeleton of an arthropod. Origin: mid 19th century: from Greek sklēros 'hard' + -ite1sclerite in other Oxford dictionaries Definition of sclerite in the US English dictionary