fourth vs quaternary what difference

what is difference between fourth and quaternary

English

Etymology

From Middle English fourthe, an alteration (due to four) of ferthe, from Old English fēorþa, fēowerþa, from Proto-West Germanic *feurþō, from Proto-Germanic *fedurþô, equivalent to four +‎ -th.

Pronunciation

  • (Received Pronunciation) IPA(key): /fɔːθ/
  • (General American) enPR: fôrth, IPA(key): /fɔɹθ/
  • (rhotic, without the horsehoarse merger) IPA(key): /fo(ː)ɹθ/
  • (non-rhotic, without the horsehoarse merger) IPA(key): /foəθ/
  • Rhymes: -ɔː(ɹ)θ
  • Homophone: forth

Adjective

fourth (not comparable)

  1. The ordinal form of the number four.

Usage notes

Abbreviations: 4th, 4th, IVth, IIIIth; (in names of monarchs and popes, and formal names in English) IV, IV.

Derived terms

Translations

Noun

fourth (plural fourths)

  1. (not used in the plural) The person or thing in the fourth position.
  2. (chiefly American) A quarter, one of four equal parts of a whole.
  3. (not used in the plural) The fourth gear of an engine.
  4. (music) A musical interval which spans four degrees of the diatonic scale, for example C to F (C D E F).

Synonyms

  • (quarter): fourth part, quarter, ¼, farthing

Derived terms

Translations


Middle English

Adjective

fourth

  1. Alternative form of ferthe


English

Etymology

From the 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.

Pronunciation

  • (UK) IPA(key): /kwəˈtɜːnəɹi/; (rare) IPA(key): /ˈkwɔːtən(ə)ɹi/
  • (US) IPA(key): /ˈkwɑːtɚˌnɛəɹi/

Adjective

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

Usage notes

The fourth ordinal from Latin that might etymologically follow tertiary is quartary, but quaternary (from the distributive number instead) is more usual in English.

Related terms

  • quaternion

Derived terms

  • bisquaternary
  • quaternary ammonium

Translations

See also

  • unary, unitary (1)
    • primary (1st)
  • binary (2)
    • secondary (2nd)
  • ternary or trinary (3)
    • tertiary (3rd)
  • quaternary (4)
    • quartary (4th)
    • tetranary (4)
  • quinary (5)
  • senary (6)
  • septenary (7)
  • octonary (8)
  • novenary (9)
    • nonary (9th)
  • denary (10)
  • duodenary (12)
  • vicenary (20)
  • tricenary (30)
  • sexagenary (60)
  • centenary (100)

Noun

quaternary (plural quaternaries)

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

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