Word.ws English Dictionary

gigaannum

gigaannum is the alternative spelling of giga-annum.

Meaning of giga-annum

Noun

giga-annum (plural giga-annums)

  1. Synonym of gigayear: a billion years.
    • Geophysicists today estimate the earth’s age to be 4.5–4.6 Ga (giga-annums = 1 x 10⁹ years) based on data from lead isotopes (Dalrymple 403).2000, A. S. Weber, Nineteenth-Century Science: An Anthology, →ISBN, page 387
    Synonyms:
    gigayear

Forms of gigaannum

pluralgigaannums

Questions about gigaannum

What is gigaannum the alternative spelling of?
Gigaannum is the alternative spelling of giga-annum.

Words near gigaannum in the dictionary

  1. giga-watt
  2. gigaamp
  3. gigaampere
  4. gigaamperes
  5. gigaamps
  6. gigaannum
  7. gigaannums
  8. gigabarrel
  9. gigabarrels
  10. gigabase
  11. gigabasepair

Source and license

Adapted from Wiktionary: gigaannum (page history and authors); giga-annum (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.

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