• (British) IPA: /kwəˈtɜːnəɹi/; (rare) IPA: /ˈkwɔːtən(ə)ɹi/
  • (America) IPA: /ˈkwɑːtɚˌnɛəɹi/

quaternary (not comparable)

  1. Of fourth rank or order
    the quaternary stress in a pronounced word
  2. Of a mathematical expression containing e.g. x4
  3. Relating to or in number base four
  4. (organic chemistry) quaternary ammonium
  5. (inorganic chemistry) composed of four elements
Related terms Translations Translations
  • French: d'ordre quatre

quaternary (plural quaternaries)

  1. (chemistry) A quaternary compound.
  2. (geology) The Quaternary period or the system of deposits laid down during it.

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

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