髓鞘

髓鞘 in English

suǐ qiào: myelin sheath (membrane surrounding axon of nerve cell)

Character breakdown

髓 suǐ (bound form) bone marrow
鞘 qiào scabbard

How it used to be written

Small seal script

Forms, sources and dates: the 字形演變 database of 小學堂, Academia Sinica, public domain (CC0).

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