血けっ清せい病びょうけっせいびょうMeanings1nounserum sicknessmedicineMedical term for a hypersensitivity reaction to animal-derived antiserum, typically presenting with fever, rash, and joint pain.抗こう毒どく素そ血けっ清せいの投とう与よ後ごに血けっ清せい病びょうが発はっ生せいすることがある。Serum sickness can occur after administration of antitoxin serum.