单词	pentavalent
释义	pentavalent adjective pen·​ta·​va·​lent ˌpen-tə-ˈvā-lənt  : having a valence of five Example Sentences Recent Examples on the Web The pentavalent vaccine -- which protects against five diseases (diphtheria, tetanus, pertussis, hepatitis B and Haemophilus influenzae type B) -- is a great example. Bill Gates, CNN, 13 Oct. 2021 Word History First Known Use 1866, in the meaning defined above Medical Definition pentavalent adjective pen·​ta·​va·​lent ˌpent-ə-ˈvā-lənt  : having a valence of five
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