exocuticlen.

/ˈɛksəʊkjuːtɪk(ə)l/

Forms: Also exocuˈticula.

Etymology: < exo- prefix + cuticle n.

The middle layer of a cuticle.

a. The hard, chitinous outer part of the procuticle of an insect or other arthropod.

ΚΠ

1929 F. L. Campbell in Ann. Entomol. Soc. Amer. XXII. 415 Following the suggestion of Mr. R. E. Snodgrass, of the Bureau of Entomology, the writer calls the extremely thin outermost layer (Grenzlamelle) the epicuticula, the brittle, pigmented outer layer (epidermis, Pigmentschichte) the exocuticula, and the flexible, colorless inner layer (dermis, Hauptlage) the endocuticula.

1951 A. G. Richards Integument of Arthropods xvi. 149 In calcified cuticles, at least of decapod crustacea, the exocuticle and outer portion of the endocuticle become calcified.

1967 P. A. Meglitsch Invertebr. Zool. xvi. 676 Beneath it [sc. the epicuticle] is the procuticle, made up of two layers, an outer exocuticle, often pigmented and impregnated with the substances found in the epicuticle, and an inner endocuticle. It is the exocuticle that is thickened to form the skeletal plates or sclerites.

b. The middle part of the cuticle that surrounds animal fibres or hairs, etc.

ΚΠ

1949 J. Lindberg et al. in Textile Research Jrnl. XIX. 674/1 Proceeding from the outside of the fiber inward..the following have been described: (a) a very thin epicuticular membrane..forming the external surface of the fiber, (b) an exocuticle layer and (c) an endocuticle... The epicuticle, as seen in the electron microscope, appears as a thin, uniformly thick..film falling easily into folds.

1962 W. J. Onions Wool ii. 16 The exocuticle, which constitutes about half of the scale, is a protein resistant to digestion by trypsin.

This entry has not yet been fully updated (first published 1972; most recently modified version published online December 2020).

单词	exocuticle
释义	exocuticlen. /ˈɛksəʊkjuːtɪk(ə)l/ Forms: Also exocuˈticula. Etymology: < exo- prefix + cuticle n. The middle layer of a cuticle. a. The hard, chitinous outer part of the procuticle of an insect or other arthropod. ΚΠ 1929 F. L. Campbell in Ann. Entomol. Soc. Amer. XXII. 415 Following the suggestion of Mr. R. E. Snodgrass, of the Bureau of Entomology, the writer calls the extremely thin outermost layer (Grenzlamelle) the epicuticula, the brittle, pigmented outer layer (epidermis, Pigmentschichte) the exocuticula, and the flexible, colorless inner layer (dermis, Hauptlage) the endocuticula. 1951 A. G. Richards Integument of Arthropods xvi. 149 In calcified cuticles, at least of decapod crustacea, the exocuticle and outer portion of the endocuticle become calcified. 1967 P. A. Meglitsch Invertebr. Zool. xvi. 676 Beneath it [sc. the epicuticle] is the procuticle, made up of two layers, an outer exocuticle, often pigmented and impregnated with the substances found in the epicuticle, and an inner endocuticle. It is the exocuticle that is thickened to form the skeletal plates or sclerites. b. The middle part of the cuticle that surrounds animal fibres or hairs, etc. ΚΠ 1949 J. Lindberg et al. in Textile Research Jrnl. XIX. 674/1 Proceeding from the outside of the fiber inward..the following have been described: (a) a very thin epicuticular membrane..forming the external surface of the fiber, (b) an exocuticle layer and (c) an endocuticle... The epicuticle, as seen in the electron microscope, appears as a thin, uniformly thick..film falling easily into folds. 1962 W. J. Onions Wool ii. 16 The exocuticle, which constitutes about half of the scale, is a protein resistant to digestion by trypsin. This entry has not yet been fully updated (first published 1972; most recently modified version published online December 2020). < n.1929
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