myelin
noun /ˈmaɪəlɪn/
/ˈmaɪəlɪn/
[uncountable] (biology- a mixture of proteins and fats that surrounds many nerve cells, increasing the speed at which they send signals
髓磷脂,髓鞘质(由脂质、蛋白质组成,包绕在神经细胞轴突上) 词源late 19th cent.: from Greek muelos ‘marrow’ + -in.