noun
agglutinogen
Technical term in immunology and serology; a substance that stimulates the production of an agglutinin.
凝集原は、赤血球の表面に存在する抗原の一種です。
Agglutinogens are a type of antigen present on the surface of red blood cells.
凝集素 (agglutinin) is the antibody that reacts with 凝集原 (agglutinogen) to cause agglutination.
Compound of 凝集 (ぎょうしゅう, 'agglutination') and 原 (げん, 'source' or 'origin'), likely a calque from German or English medical terminology.