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Showing results for quaternary. Search instead for quaternar.
Definitions

quaternary

[kwot-er-ner-ee, kwuh-tur-nuh-ree] / ˈkwɒt ərˌnɛr i, kwəˈtɜr nə ri /
ADJECTIVE
four
Synonyms
STRONG
quadruple quadruplicate tetrad
WEAK
quadrigeminal quadripartite quadrivial quaternate
NOUN
four
Synonyms
STRONG
quadrivium quadrumvirate quadruple quadruplet quadruplets quartet quartette quaternion quaternity tetrad tetralogy
WEAK
quadrigeminal quadripartition

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.

Sunway Healthcare operates its flagship quaternary hospital in Kuala Lumpur, Malaysia’s capital.

From The Wall Street Journal • Feb. 6, 2026

Sunway Healthcare operates its flagship quaternary hospital in Kuala Lumpur, the country’s capital.

From The Wall Street Journal • Nov. 5, 2025

They identified chemicals that selectively damaged oligodendrocytes belong to two classes: organophosphate flame retardants and quaternary ammonium compounds.

From Science Daily • Mar. 25, 2024

The Salyerses’ unusual marriage is known as a quaternary marriage, and their sons are known as quaternary twins.

From Washington Post • Aug. 24, 2022

In some books, too, you will find the tertiary and quaternary taken out and replaced by periods of different lengths called the Palaeogene and Neogene.

From "A Short History of Nearly Everything" by Bill Bryson