sclerotic : Idioms & Phrases
sclerotic coat
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noun the whitish fibrous membrane (albuginea) that with the cornea forms the outer covering and protection of the eyeball
sclera.
WordNet
Sclerotic parenchyma
(Bot.) , sclerenchyma. By some writers a distinction is made, sclerotic parenchyma being applied to tissue composed of cells with the walls hardened but not thickened, and sclerenchyma to tissue composed of cells with the walls both hardened and thickened.