quaternary

qua·ter·na·ry | \ ˈkwä-tər-ˌner-ē

How to pronounce quaternary (audio)

, ˈkwä-tə-, kwə-ˈtər-nə-rē

How to pronounce quaternary (audio)

\

Definition of quaternary

(Entry 1 of 2)

1a : of, relating to, or consisting of four units or members

b : of, relating to, or being a number system with a base of four

2 capitalized : of, relating to, or being the geological period from the end of the Tertiary to the present time or the corresponding system of rocks — see Geologic Time Table

3 : consisting of, containing, or being an atom bonded to four other atoms

quaternary

plural quaternaries

Definition of quaternary (Entry 2 of 2)

1 capitalized : the Quaternary period or system of rocks

2 : a member of a group fourth in order or rank

Examples of quaternary in a Sentence

Recent Examples on the Web: Adjective Ciochon's research team combined forces with geochronologist and quaternary scientist Kira Westaway's team also working at the site. — Ashley Strickland, CNN, "The last of the first humans to walk upright have been discovered," 18 Dec. 2019 The industry standard for wipes and sprays is a solution that contains quaternary ammonium, an anti-bacterial compound. — Scott Douglas, Washington Post, "Your gym is teeming with invisible members: Germs. Here’s how to avoid them.," 29 July 2019 The industry standard for wipes and sprays is a solution that contains quaternary ammonium, an anti-bacterial compound. — Scott Douglas, sun-sentinel.com, "Your gym is teeming with invisible members: Germs. Here’s how to avoid them.," 29 July 2019 Ingestion of quaternary-ammonium compounds in dogs can cause reduced appetite, and gastric irritation including diarrhea and vomiting. — Seattle Times Staff, The Seattle Times, "Huge recall of rawhide dog chew gets a lot bigger," 19 June 2017 A class of biocides known as quaternary ammonium compounds, or quats, is one chemical treatment that temporarily diminishes biofilms and their visible effects. — National Geographic, "Black Slime Is Coating World Monuments—And That May Be Good," 21 Sep. 2016 The affected batch was recalled after the pet group found that the rawhide chew manufacturers in Mexico, Columbia and Brazil were using a quaternary ammonium compound mixture in the process of manufacturing the items. — Lindsey Murray, Good Housekeeping, "[UPDATED] United Pet Group Adds Eight Additional Brands to Its Dog Chew Recall," 20 June 2017 Recent Examples on the Web: Noun Today's PT lumber is treated with safer, less toxic chemicals, such as alkaline copper quaternary (ACQ) or copper azole. — Joseph Truini, Popular Mechanics, "How to Choose a Deck Material That Is Right for You," 6 June 2017

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

Keep scrolling for more

Learn More about quaternary

Dictionary Entries near quaternary

quatercentenary

quaternary ammonium compound

quaternary silver

Statistics for quaternary

Last Updated

25 Dec 2019

Cite this Entry

“Quaternary.” The Merriam-Webster.com Dictionary, Merriam-Webster Inc., https://www.merriam-webster.com/dictionary/quaternary. Accessed 18 January 2020.

Keep scrolling for more

WORD OF THE DAY

vicarious

experienced by way of someone else

Test Your Vocabulary

The Eponym Quiz

Which is the best synonym of bowdlerize?

Can you spell these 10 commonly misspelled words?

Test Your Knowledge - and learn some interesting things along the way.