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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 ?
Homology of the genital sclerites of Megaloptera (Insecta: Neuropteridae) and their phylogenetic relevance.
First maxillae are modified into sucking disks and the rim was supported with 41-42 rods which was overlapping small sclerites.
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.
Prominent scrobal sclerites (ss) frame a tall triangular frontal fastigium (ff) bearing a large median ocellus.
75 times as long as wide, basal margin widest; sclerites of tergum 6 small, about 0.
70 X length of basal breadth, composed of two sclerotized, slightly curved sclerites, each slightly swollen distally, with a mesal notch on tip.
Mouthparts have two outer elements or triangular sclerites which are absent in the first instar, appear in the second and remains in the third instar.
Then the damaged vertebral body intercalated disc involved and intraspinal sclerites were explored and those intruding in the spinal canal were gradually cleared to completely relieve the oppression.
Ventral arch (VA) articulating with ventral margin of mouth hook, sclerotized, two foramens, anterior margin with 20-24 denticles, posterior margin V-shaped; epistomal sclerite (ES) bilobed, welded to both parastomal bars (PB), all C-shaped; parastomal bars posteriorly fused with pharyngeal sclerites.
3mm long with large cephaloskeleton and strongly bent sclerites (Fig.
Three major sclerites, the subtegulum, the tegulum, and the embolus, are held together as a single structure by flexible membranes.
Its body was covered in external, hardened structures called sclerites, which are not found on modern entoprocts.