isoagglutinin
nounAn isoantibody normally present in the serum of an individual that causes the agglutination of the red blood cells of another individual of the same species.
nounAn agglutinin directed against cells of animals of the same species, as the one furnishing the agglutinin.
nounan antibody produced by one individual that causes agglutination of red blood cells in other individuals of the same species