甲こう皮ひMeanings1nouncarapace; shell; crustTechnical term for the hard outer covering of animals such as turtles, crustaceans, and some insects. Often used in biological contexts; compare with 甲殻 (こうかく) which refers more broadly to shells and crusts.See also: 甲殻カメの甲こう皮ひは非ひ常じょうに硬かたい。A turtle's carapace is very hard.甲こう皮ひの構こう造ぞうを顕けん微び