noun. A substance, such as an antibody, that causes agglutination of red blood cells.

noun. Same as hemoagglutinin.

noun. An antigenic glycoprotein that causes agglutination of red blood cells

"Flu vaccines and drugs focus on proteins found on the surface of the flu virus called hemagglutinin and neuraminidase, which give influenza A viruses their names, as in H5N1 or"

acute-phase  andsignature  cell-surface  cytosolic  function-associated