moultn. 換毛、脫毛v. 脫毛、換毛學術名詞蛻皮：動物學、獸醫學蠶脫皮：紡織科技換羽：獸醫學英文釋義periodic shedding of the cuticle in arthropods or the outer skin in reptilescast off hair, skin, horn, or feathers