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What (who) is quaternary compound - definition
Quaternary
![Artist's impression of Earth during the [[Last Glacial Maximum]]](https://commons.wikimedia.org/wiki/Special:FilePath/IceAgeEarth.jpg?width=200 "Artist's impression of Earth during the [[Last Glacial Maximum]]")
THIRD AND CURRENT PERIOD OF THE CENOZOIC ERA
Quaternary age; Quaternary period; Quaternary Period; Quarternary; Quarterny period; The Quaternary Period; Quaternary (geology); Pleisto-Holocene; Quatenary; Quaternaries
·noun The number four.
II. Quaternary ·adj Consisting of four; by fours, or in sets of four.
III. Quaternary ·noun The Quaternary age, era, or formation. ·see the Chart of Geology.
IV. Quaternary ·adj Later than, or subsequent to, the Tertiary; Post-tertiary; as, the Quaternary age, or Age of man.
quaternary
THIRD AND CURRENT PERIOD OF THE CENOZOIC ERA
Quaternary age; Quaternary period; Quaternary Period; Quarternary; Quarterny period; The Quaternary Period; Quaternary (geology); Pleisto-Holocene; Quatenary; Quaternaries
a.
Four, fourfold, consisting of four.
quaternary
THIRD AND CURRENT PERIOD OF THE CENOZOIC ERA
Quaternary age; Quaternary period; Quaternary Period; Quarternary; Quarterny period; The Quaternary Period; Quaternary (geology); Pleisto-Holocene; Quatenary; Quaternaries
[kw?'t?:n(?)ri]
¦ adjective
1. fourth in order or rank.
2. (Quaternary) Geology relating to or denoting the most recent period in the Cenozoic era, following the Tertiary period (comprising the Pleistocene and Holocene epochs and beginning 1.64 million years ago).
3. Chemistry denoting an ammonium compound containing a cation of the form NR4+, where R represents organic groups.
Origin
ME: from L. quaternarius, from quaterni 'four at once', from quater 'four times', from quattuor 'four'.
Wikipedia
Quaternary compound
In chemistry, a quaternary compound is a compound consisting of exactly four chemical elements.
