单词	trivalent
释义	trivalent adjective tri·​va·​lent (ˌ)trī-ˈvā-lənt  1 : having a chemical valence of three 2 : conferring immunity to three different pathogenic strains or species a trivalent influenza vaccine Example Sentences Recent Examples on the Web As a first step, in April 2016 all countries switched from the trivalent version of OPV—which covers all three types of polio virus—to a bivalent one, which lacks the type 2 component. Leslie Roberts, Science | AAAS, 10 July 2019 Word History Etymology International Scientific Vocabulary First Known Use 1865, in the meaning defined at sense 1 Medical Definition trivalent 1 of 2 adjective tri·​va·​lent (ˈ)trī-ˈvā-lənt  1 : having a chemical valence of three 2 : conferring immunity to three different pathogenic strains or species a trivalent influenza vaccine trivalent 2 of 2 noun : a group of three synapsed homologous chromosomes in meiosis
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