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Deca-

This article is about the SI prefix. For other uses, see Deca (disambiguation).
Look up deca- in Wiktionary, the free dictionary.
Look up deca-, deka-, or dec- in Wiktionary, the free dictionary.

Deca- (and dec-), sometimes deka-, is a common English-language numeral prefix derived from the Late Latin decas ("(set of) ten"), from Ancient Greek δεκάς (dekás), from δέκα (déka, "ten").[1] It is used in many words.

It is also a decimal unit prefix in the International System of Units (SI) denoting a factor of ten, with symbol da and spelled "deca" internationally[a] (or "deka" in American spelling[3]).

  1. ^ Chambers Twentieth Century Dictionary. 1979. p. 332.
  2. ^ Decimal multiples and submultiples of SI units Archived 2019-03-30 at the Wayback Machine, 2006, SI Brochure: The International System of Units (SI), 8th edition
  3. ^ Guide for the Use of the International System of Units (SI), 1995, NIST Special Publication 811


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