Gigaannum

noun

noun ·Rare ·Advanced level

Definitions

Noun
  1. 1
    Alternative spelling of giga-annum (“gigayear, a billion years”). alt-of, alternative

    "Studies of the Earth’s processes, phenomena, and origins are unique in the physical sciences for their need to observe and measure past events over spatial and temporal scales that range from the micron and second to the astronomical unit and gigaannum."

Synonyms

All synonyms
gigayear

Example

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"Studies of the Earth’s processes, phenomena, and origins are unique in the physical sciences for their need to observe and measure past events over spatial and temporal scales that range from the micron and second to the astronomical unit and gigaannum."

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.