QUATERNARY

fourth, th, quaternary

(adjective) 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”

quaternate, quaternary

(adjective) consisting of or especially arranged in sets of four; “quaternate leaves”; “a quaternary compound”

four, IV, tetrad, quatern, quaternion, quaternary, quaternity, quartet, quadruplet, foursome, Little Joe

(noun) the cardinal number that is the sum of three and one

Quaternary, Quaternary period, Age of Man

(noun) last 2 million years

Source: WordNet® 3.1


Etymology

Adjective

quaternary (not comparable)

Of fourth rank or order

Of a mathematical expression containing e.g. x4

Relating to or in number base four

(organic chemistry) quaternary ammonium

(inorganic chemistry) composed of four elements

Usage notes

The etymologically correct fourth ordinal from Latin (following tertiary) is quartary, but quaternary (from the distributive number instead) is common, particularly in biology.

Noun

quaternary (plural quaternaries)

(chemistry) A quaternary compound.

(geology) The Quaternary period or the system of deposits laid down during it.

Etymology

Proper noun

Quaternary

(geology) The geological period of the Cenozoic Era immediately following the Tertiary. It is subdivided into the Pleistocene and the Holocene Epochs.

Source: Wiktionary


Qua*ter"na*ry, a. Etym: [L. quaternarius consisting of four each, containing four, fr. quaterni four each, fr. quattuor four: cf. F. quaternaire. See Four.]

1. Consisting of four; by fours, or in sets of four.

2. (Geol.)

Definition: Later than, or subsequent to, the Tertiary; Post-tertiary; as, the Quaternary age, or Age of man.

Qua*ter"na*ry, n. Etym: [L. numerus quaternarius: cf. F. quaternaire.]

1. The number four. Boyle.

2. (Geol.)

Definition: The Quaternary age, era, or formation. See the Chart of Geology.

Source: Webster’s Unabridged Dictionary 1913 Edition



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Word of the Day

20 April 2025

SALAD

(noun) food mixtures either arranged on a plate or tossed and served with a moist dressing; usually consisting of or including greens


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Coffee Trivia

According to Guinness World Records, the most massive cup of coffee contained 22,739.14 liters and was created by Alcaldía Municipal de Chinchiná (Colombia) at Parque de Bolívar, Chinchiná, Caldas, Colombia, on 15 June 2019. Fifty people worked for more than a month to build this giant cup. The drink prepared was Arabic coffee.

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