Word.ws English Dictionary

semifactorials

semifactorials is the plural of semifactorial.

Meaning of semifactorial

Noun

semifactorial (plural semifactorials)

  1. (rare) Synonym of double factorial.
    • With the symbol n#33;#33; we indicate the semifactorial of n, that is the product 1.3.5#92;dotsn if n is odd, and the product 2.4.6#92;dotsn if n is even.1942 February, Giulio Racah, “Theory of Complex Spectra. I”, in Physical Review, volume 61, numbers 3–4, →DOI, page 188

Questions about semifactorials

What is semifactorials the plural of?
Semifactorials is the plural of semifactorial.

Words near semifactorials in the dictionary

  1. semifable
  2. semifables
  3. semifabulous
  4. semifacetious
  5. semifactorial
  6. semifactorials
  7. semifactual
  8. semifactually
  9. semifactuals
  10. semifaience
  11. semifaiences

Source and license

Adapted from Wiktionary: semifactorials (page history and authors); semifactorial (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

Last updated:

Cite this entry: “semifactorials.” Word.ws, https://word.ws/semifactorials. Based on Wiktionary, CC BY-SA 4.0.