quaternary
UK /kwəˈtɜː.nə.ɹi/ · US /ˈkwɑ.tɚˌnɛɹ.i/ adjective, noun, proper noun
Forms quaternaries
- adjective Of fourth rank or order. “the quaternary stress in a pronounced word”
- adjective Of a mathematical expression containing e.g. x⁴.
- adjective Relating to or in number base four.
- adjective (organic chemistry) having a quaternary ammonium group.
- adjective (inorganic chemistry) Composed of four elements.
- noun (chemistry) A quaternary compound.
- noun (geology) The Quaternary period or the system of deposits laid down during it.
- proper noun (geology) The geological period of the Cenozoic Era immediately following the Tertiary. It is subdivided into the Pleistocene and the Holocene Epochs.
Synonyms
quartal quartary Age of Man Quaternary period four 4 IV tetrad quatern quaternion quaternity quartet quadruplet foursome Little Joe quaternate fourth 4th
Etymology
Derived from Latin quaternārius (“containing or consisting of four”), from quaternī (“four each”, “four at a time”) + -ārius (whence the English suffix -ary); compare the French quaternaire.
From Latin quaternārius (“consisting of four”), from quaternī (“by fours”); in numerical sense via Middle English quaternary. Compare French quaternaire.
Webster’s 1913
- adjective Consisting of four; by fours, or in sets of four.
- adjective Later than, or subsequent to, the Tertiary; Post-tertiary; as, the Quaternary age, or Age of man.
- noun The number four. Boyle.
- noun The Quaternary age, era, or formation. See the Chart of Geology.
Etymology [L. quaternarius consisting of four each, containing four, fr. quaterni four each, fr. quattuor four: cf. F. quaternaire. See Four.]
Etymology [L. numerus quaternarius: cf. F. quaternaire.]
Sources: Wiktionary · WordNet 3.0 · Webster’s 1913 — from the Wiktionary entry “quaternary”, CC BY-SA 4.0. Details