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English Wikipedia has an article on:
English numbers (edit)
[a], [b] ←  9 10 11  → [a], [b]
1[a], [b]
    Cardinal: ten
    Ordinal: tenth, decato-
    Latinate ordinal: decimary
    Multiplier: decuple, tenfold
    Collective: decad, decade, tensome
    Fractional: tenth
    Number of musicians: decet


From Middle English tenth, tenthe. Old English had tēoþa (origin of Modern English tithe), but the force of analogy to the cardinal number "ten" caused Middle English speakers to recreate the regular ordinal and re-insert the nasal consonant. Ultimately from Proto-Germanic *tehundô. Equivalent to ten (numeral) +‎ -th (suffix forming ordinals).



tenth (not comparable)

  1. The ordinal numeral form of ten; next in order after that which is ninth.
    • 1859, Charles Dickens, “The Substance of the Shadow”, in A Tale of Two Cities, London: Chapman and Hall, [], OCLC 906152507, book III (The Track of a Storm), page 214:
      These words are formed by the rusty iron point with which I write with difficulty in scrapings of soot and charcoal from the chimney, mixed with blood, in the last month of the tenth year of my captivity.
  2. Being one of ten equal parts of a whole.




tenth (plural tenths)

  1. The person or thing coming next after the ninth in a series; that which is in the tenth position.
  2. One of ten equal parts of a whole.
    • 2013 August 3, “Boundary problems”, in The Economist, volume 408, number 8847:
      Economics is a messy discipline: too fluid to be a science, too rigorous to be an art. Perhaps it is fitting that economists’ most-used metric, gross domestic product (GDP), is a tangle too. GDP measures the total value of output in an economic territory. Its apparent simplicity explains why it is scrutinised down to tenths of a percentage point every month.
  3. (music) The interval between any tone and the tone represented on the tenth degree of the staff above it, as between one of the scale and three of the octave above; the octave of the third.
  4. (Britain, law, historical, in the plural) A temporary aid issuing out of personal property, and granted to the king by Parliament; formerly, the real tenth part of all the movables belonging to the subject.




tenth (third-person singular simple present tenths, present participle tenthing, simple past and past participle tenthed)

  1. To divide by ten, into tenths.


tenth in Webster’s Revised Unabridged Dictionary, G. & C. Merriam, 1913.