Definition of "antiserum" [antiserum]

• Human or animal serum containing antibodies that are specific for one or more antigens. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "Rebecca Day and daughter Mollie, 12, were given an infusion of the antiserum, which is not yet proven to work in humans, on May 27 after they were exposed to the girl's infected horse on the family's property at Tewantin."
• "Its blockade by the antiserum increased by up to 50 times the production of endogenous retroviruses in the culture medium."
• "In Villejuif, France, Ion Gresser had prepared a potent antiserum neutralising any molecule of alpha endogenous interferon produced by individual cells."