n.a simple protein found in horny and cartilaginous tissues and in the lens of the eye
同义词：albuminoid
英汉双解大词典
scleroprotein/ˌsklɪərəʊˈprəʊtiːn/
1.
N（名词）
any of a group of insoluble stable proteins such as keratin, elastin, and collagen that occur in skeletal and connective tissues 硬蛋白 (Also called albuminoid)