- n. 浆液；树液；乳清；免疫血清
名复: serums sera
serum
KK:[ˈsɪrǝm] DJ:[ˈsiǝrǝm]
以上来源于：《英汉大辞典》
/ˈsɪərəm/
n.
(pl. sera
/-rə/
or serums)
- an amber-coloured, protein-rich liquid which separates out when blood coagulates.
- the blood serum of an animal, used to provide immunity to a pathogen or toxin by inoculation or as a diagnostic agent.
Etymology
C17: from L., lit. ‘whey’.
以上来源于：《简明牛津英语词典》
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