n.

1. 【生化】浆液；血清[U]
2. 【植】树液[U]
3. 乳清[U]
4. 【生化】【医】免疫血清[U][C]
   anti-snakebite serum

   治蛇咬伤的免疫血清

n.

1. an amber-coloured, protein-rich liquid which separates out when blood coagulates.
2. the blood serum of an animal, used to provide immunity to a pathogen or toxin by inoculation or as a diagnostic agent.