univalent /ˌjuːnɪˈveɪlənt/adjective 4noun 1forms 1 adjective4 •Having an atomic valence of 1, or having only one valence. •Having a vaccine valence of 1. •Of, or relating to, a chromosome that is not paired with its homologous chromosome during synapsis. •(Holomorphic and) injective. noun1 •Any univalent chromosome. formsunivalents