单词	quadrivalent
释义	quadrivalent /ˌkwɒdrɪˈveɪl(ə)nt / adjective Chemistry Another term for tetravalent.The complications arising from quadrivalent or trivalent plus univalent formation are not considered in this article.... The six spreads with the most well-separated chromosomes were evaluated and showed the same characteristic quadrivalent structure during meiosis. The government of Saudi Arabia has now made quadrivalent meningococcal vaccination (ACWY Vac) a visa requirement for pilgrims.
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