bivalent /baɪˈveɪlənt/adjective 3noun 1forms 3 adjective3 •Having a valence of 2; having two ligands. •Of, or relating to a pair of homologous synapsed chromosomes that occur during meiosis. •Of a vaccine, protecting against two different viruses. noun1 •Any bivalent chromosome. formsbivalents · more bivalent · most bivalent