threefold

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English[edit]

Etymology[edit]

From Middle English threfold, from Old English þrīfeald. Equivalent to three +‎ -fold

Pronunciation[edit]

Adjective[edit]

threefold (not comparable)

  1. three times as great
  2. triple

Translations[edit]

Adverb[edit]

threefold (not comparable)

  1. by a factor of three

Translations[edit]

Noun[edit]

threefold (plural threefolds)

A threefold, the twisted cubic.
  1. (mathematics) An algebraic variety of degree 3.
    • 2015, Xun Yu, “McKay correspondence and new Calabi-Yau threefolds”, in (Please provide the book title or journal name)[1]:
      In this way, we find some new pairs $(h^{1,1},\;h^{2,1})$ of Hodge numbers of Calabi-Yau threefolds.

Alternative forms[edit]

  • three-fold
  • 3-fold