Adjective "quaternary" definition and examples



Definitions and examples


Fourth in order or rank; belonging to the fourth order.
  1. 'One of the two vascular hemoglobins possesses a hexagonal-bilayer hemoglobin (HBL-Hb) quaternary structure, which is only found in the Annelida and Vestimentifera.'
Relating to or denoting the most recent period in the Cenozoic era, following the Tertiary period and comprising the Pleistocene and Holocene epochs.
  1. 'Miocene-Pliocene volcanic rocks have a calc-alkaline character which gives way to a predominantly alkaline character in late Pliocene to Quaternary times.'
  2. 'Late Tertiary and Quaternary glacial, alluvial and lacustrine sediments are widespread adjacent to the mountains and in intermontane basins.'
Denoting an ammonium compound containing a cation of the form NR₄⁺, where R represents organic groups or atoms other than hydrogen.
  1. 'Phenols and phenolics, quaternary ammonium compounds, 1: 500 bleach - water solutions, and iodine and iodophors are used in low-level disinfection.'
  2. 'Glycinebetaine (N, N, N-trimethylglycine; hereafter betaine) is a quaternary ammonium compound that occurs naturally in a wide variety of plants, animals and microorganisms.'
  3. 'What remains to be determined is how the reaction mechanism for this enzyme might differ from those PBGS that show both an absolute requirement for metal ions and an octameric quaternary structure.'
  4. 'Because this enzyme shows no activity in its monomeric form, correct quaternary structure is essential for the formation of active enzyme.'
  5. 'The quaternary nitrogen atom in lycobetaine plays an important role in the formation of hydrogen bonds between the compound and the oligonucleotide.'


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


    1. consisting of four.

    2. arranged in fours.

    3. (initial capital letter) Geology. noting or pertaining to the present period of earth history, forming the latter part of the Cenozoic Era, originating about 2 million years ago and including the Recent and Pleistocene Epochs.

    4. Metallurgy. (of an alloy) having four principal constituents. noun, plural quaternaries.

    5. a group of four.

    6. the number four.

    7. (initial capital letter) Geology. the Quaternary Period or System.

    More examples(as adjective)

    "sectors can be quaternary."

    "changes can be quaternary."

    "geologies can be quaternary."

    "researchs can be quaternary."

    "geographies can be quaternary."

    More examples++


    Late Middle English (as a noun denoting a set of four): from Latin quaternarius, from quaterni ‘four at once’, from quater ‘four times’, from quattuor ‘four’.