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A chitinous or calcareous plate or similar part of an invertebrate, especially one of the hard outer plates forming part of the exoskeleton of an arthropod.


1. (Zoology) any of the hard chitinous plates that make up the exoskeleton of an arthropod
2. (Zoology) any calcareous or chitinous part, such as a spicule or plate
[C19: from sclero- + -ite1]
scleritic adj


(ˈsklɪər aɪt, ˈsklɛr-)

Zool. any chitinous or calcareous hard plate, spicule, or the like.
scle•rit•ic (sklɪˈrɪt ɪk) adj.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.sclerite - hard plate or element of the exoskeleton of some arthropods
arthropod - invertebrate having jointed limbs and a segmented body with an exoskeleton made of chitin
protective covering - the tough natural covering of some organisms
References in periodicals archive ?
Measurement of either mouth hooks or the pharyngeal sclerite showed clear separation between adjacent instars of Liriomyza sativae Blanchard (Diptera: Agromyzidae) (Petitt 1990).
Eighth tergite modified into a pair of elongate sclerites much longer than preceding tergite, only vestiture on each sclerite a single trichoid sensilla anteriorly and a row of setae posteriorly; 2nd to 6th sternites rectangular, narrower than tergites, with a double posterior row of setae, lateral setae, elsewhere covered with scales, except near anterior margin, with pair of closely set anterior trichoid sensilla; seventh stemite similarly shaped with anterior pair of trichoid sensilla, single row of posterior setae, lateral setae, elsewhere covered with scales, except at basal third; eighth stemite unsclerotized.
The basal portion of stem-vein setulose dorsally, subcostal sclerite bare (fig.
Palpal segment 2 at most as long as 4, usually shorter; Newstead sensilla in a patch situated in basal half of palpal segment 3; anterior katepisternal setae absent; labial furcal sclerite present.
The anterior sclerite has been lost in modern arthropods, as it most likely fused with other parts of the head during the evolutionary history of the group," said Javier Ortega-Hernandez, researcher from Cambridge Universitys department of earth sciences, who authored the study.
As a result, mouthparts are composed by two groups of dental sclerites, corresponding to the tento pharyngeal and hypopharyngeal sclerite.
All statements of sclerite position refer to the unexpanded left bulb from its ventral view.
Synonymous anatomical terms, sclerite descriptions, and spellings
Phallobase tubular, short, slightly curved near base; endotheca with 1-3 large phallic spines (holotype with a single spine); phallotremal sclerite indistinct (Fig.