integument
plural of micromold
(mathematics) biinfinite
present participle of outfund
(biology) An outer protective covering such as the feathers or skin of an animal, a rind or shell. / (botany) The outer layer of an ovule, which develops into the seed coat.
そのカメの硬い外皮は、捕食者や荒れた地形から身を守った。
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