noun, plural quat·er·nar·ies.
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Origin of quaternary
Words nearby quaternary
Example sentences from the Web for quaternary
El Centro Regional is not a tertiary or quaternary care center, meaning it’s not a hospital with extensive specialty service or care.‘Like drowning in slow motion’: Life on the ground at one of America’s hardest-hit COVID-19 hospitals|matthewheimer|December 1, 2020|Fortune
And the bones of man himself appear, extending through what is known as the Quaternary or Pleistocene period.Man And His Ancestor|Charles Morris
Subspeciation has been enhanced by the late Quaternary mountain building which was prevalent over the western United States.Speciation in the Kangaroo Rat, Dipodomys ordii|Henry W. Setzer
A distinct species characterised the Quaternary deposits of South America.Mythical Monsters|Charles Gould
The Tertiary and Quaternary formations are partly of marine and partly of terrestrial and fresh-water origin.
The Post-tertiary or Quaternary division comprises the concluding chapters of geological history.