noun🔗Share綿毛The thick, soft undercoat of some mammals, especially those that spend time in the water"The beaver's thick underfur keeps it warm even in the icy river. "ビーバーの分厚い綿毛は、氷のように冷たい川の中でも彼を暖かく保ちます。animalbodybiologynaturepartChat with AIVocabulary GamePractice Reading