髓 seoi⁵ {suǐ}

1. marrow
2. essence
3. quintessence
4. pith (soft interior of plant stem)

髓鞘 seoi⁵ ciu³ {suǐ qiào}

myelin sheath (membrane surrounding axon of nerve cell)

髓結〔-结〕 seoi⁵ git³ {suǐ jié}

pith knot (in timber)

髓腦〔-脑〕 seoi⁵ nou⁵ {suǐ nǎo}

1. brains
2. gray matter

髓過氧化物酶〔-过----〕 seoi⁵ gwo³ joeng⁵ faa³ mat⁶ mui⁴ {suǐ guò yǎng huà wù méi}

Myeloperoxidase (MPO), chemical in neutrophil granulocytes, used to kill pathogens