Gigannum
noun
noun ·Rare ·Advanced level
Definitions
Noun
- 1 Rare form of giga-annum (“gigayear, a billion years”). form-of, rare
"Grappling with time – from the nanoseconds of chemical reaction relaxation times to four gigannums of planetary convulsions – is something that actually unites geologists, planetary scientists, and astronomers (including cosmologists)."
Example
More examples"Grappling with time – from the nanoseconds of chemical reaction relaxation times to four gigannums of planetary convulsions – is something that actually unites geologists, planetary scientists, and astronomers (including cosmologists)."
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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.