blocking factor - Computer Programming. the number of logical records per physical record or block on a magnetic tape or disk. Immunology. any substance (generally antibodies or serum proteins) that causes a weakening or suppression of the immune response; дс тдрлими цюлютдажкию дроемжки аиакиохдйис лидр http://www.harcourt.com/dictionary/def/1/3/6/4/1364100.html;