ˈ ̷ ̷(ˌ) ̷ ̷ at anti- I+ˌ ̷ ̷ ̷ ̷ noun
Etymology: International Scientific Vocabulary anti- (I) + serum
: a serum containing antibodies that is obtained from the blood of an animal subjected to repeated sublethal doses of a microorganism or a specific toxin and that is used in treatment of the disease caused by the respective microorganism or toxin (as diphtheria or tetanus) — compare antitoxin