Quaternary Definition & Meaning
quaternary
- adjective
- consisting of or especially arranged in sets of four; "quaternate leaves"; "a quaternary compound"
- coming next after the third and just before the fifth in position or time or degree or magnitude; "the quaternary period of geologic time extends from the end of the tertiary period to the present"
- noun
- last 2 million years
- the cardinal number that is the sum of three and one
Words that rhyme with quaternary
Usage tips for "quaternary"
Understanding the precise definition of a word helps you use it with confidence. When using "quaternary" in your writing, consider whether you need the word itself or one of its synonyms — subtle differences in meaning can change the tone of a sentence. If you're writing poetry or song lyrics, check the rhymes for quaternary to find words that pair well.