trivalent

adjective
tri·​va·​lent | \ (ˌ)trī-ˈvā-lənt How to pronounce trivalent (audio) \

Definition of trivalent

1 : having a chemical valence of three
2 : conferring immunity to three different pathogenic strains or species a trivalent influenza vaccine

Examples of trivalent in a Sentence

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, "Surging cases have dashed all hope that polio might be eradicated in 2019," 10 July 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'trivalent.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of trivalent

1865, in the meaning defined at sense 1

History and Etymology for trivalent

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Time Traveler for trivalent

The first known use of trivalent was in 1865

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More Definitions for trivalent

trivalent

adjective
tri·​va·​lent | \ (ˈ)trī-ˈvā-lənt How to pronounce trivalent (audio) \

Medical Definition of trivalent

 (Entry 1 of 2)

1 : having a chemical valence of three
2 : conferring immunity to three different pathogenic strains or species a trivalent influenza vaccine

trivalent

noun

Medical Definition of trivalent (Entry 2 of 2)

: a group of three synapsed homologous chromosomes in meiosis

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