Dictionary and Thesaurus

Definition of Quaternary

• (a.) Consisting of four; by fours, or in sets of four.
• (a.) Later than, or subsequent to, the Tertiary; Post-tertiary; as, the Quaternary age, or Age of man.
• (n.) The number four.
• (n.) The Quaternary age, era, or formation. See the Chart of Geology.

Synonyms of Quaternary

• Quaternion
• Quartet
• Quaternity
• Tetrad
• Foursome
• Four
• Quadruplet
• Quatern
• Quartette
• Quadruple
• Quad
• Intravenous Feeding
• Four-Spot
• Fourth
• Quaternate
• Multiple

Antonyms of Quaternary

• Cardinal
• Single

Homophones of Quaternary