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pentavalent

American  
[pen-tuh-vey-luhnt, pen-tav-uh-] / ˌpɛn təˈveɪ lənt, pɛnˈtæv ə- /

adjective

Chemistry.
  1. having a valence of 5.

    pentavalent arsenic.

  2. quinquevalent.


pentavalent British  
/ ˌpɛntəˈveɪlənt /

adjective

  1. Also: quinquevalentchem having a valency of five

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of pentavalent

First recorded in 1870–75; penta- + -valent

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

The WHO said that only 57% of Nigerians are immunised with the pentavalent vaccine, which protects against five life-threatening diseases, including diphtheria.

From BBC • Oct. 12, 2023

MenAfriVac is given to 1- to 29-year-olds, who are most vulnerable to bacterial meningitis; one possibility is to lower the upper age limit for the pentavalent vaccine.

From Science Magazine • Oct. 7, 2021

Jacob Puliyel, head of pediatrics at St Stephen's Hospital in Delhi, has been a vocal opponent of both the HPV vaccines and the pentavalent vaccine.

From Scientific American • Jun. 22, 2011

Take the pentavalent vaccine, which combines immunisation against five diseases, such as whooping cough and diphtheria, into one.

From Economist • Jun. 16, 2011

For these reasons, one must assume the existence of pentavalent nitrogen in the diazonium salts, in order to account for their basic properties.

From Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 4 "Diameter" to "Dinarchus" by Various