giga-annum
giga-annum noun: synonym of gigayear: a billion years.
Noun
giga-annum (plural giga-annums)
- 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
- We report here the sequencing and genomic analysis of the SDR of Ectocarpus, a brown alga that has been evolving independently from plants, animals, and fungi for over one giga-annum.2014, Sophia Ahmed et al., “A Haploid System of Sex Determination in the Brown Alga Ectocarpus sp.”, in Current Biology, volume 24, number 17, →DOI
- Synonyms:
- gigayear
Synonyms of giga-annum
Forms of giga-annum
| plural | giga-annums |
|---|
Origin of giga-annum
From giga- + annum.
Questions about giga-annum
- What does giga-annum mean?
- Giga-annum means synonym of gigayear: a billion years.
- What part of speech is giga-annum?
- Giga-annum is a noun.
- What is the plural of giga-annum?
- The plural of giga-annum is giga-annums.
Words near giga-annum in the dictionary
Source and license
Adapted from Wiktionary: 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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Cite this entry: “giga-annum.” Word.ws, https://word.ws/giga-annum. Based on Wiktionary, CC BY-SA 4.0.