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conchiolin n
gen.	甲壳素
fish.farm.	贝壳硬朊
fishery	贝壳硬蛋白
oil	壳基质
English thesaurus
conchiolin n
jewl.	The first layer secreted by a mollusk to ease the discomfort caused when a foreign substance gets lodged in the mantle tissue. Very important as it binds the nacre to form the pearl.