English
fission
Fission comes from Latin fissiō ‘the act of breaking up’, from findō ‘split, divide’, and ultimately from Proto-Indo-European *bʰeyd-.
- Proto-Indo-Europeanc. 4500–2500 BCE*bʰeyd-‘to split’reconstructed
- Proto-Indo-European, derivedc. 4500–2500 BCE*bʰinédti‘to be splitting’reconstructed
- Proto-Italicc. 1500–700 BCE*findō‘to split, cleave’reconstructed
- Latinc. 75 BCE–200 CEfindō‘split, divide’
- Latin, derivedc. 75 BCE–200 CEfissiō‘the act of breaking up’
- Latin, derivedc. 75 BCE–200 CEfissiōnemaccusative singular of fissiō
- Englishtodayfission
attested reconstructed ? uncertain or disputed
Lineage
- Proto-Indo-Europeanc. 4500–2500 BCE*bʰeyd-‘to split’reconstructed
- Proto-Indo-European, derivedc. 4500–2500 BCE*bʰinédti‘to be splitting’reconstructed
- Proto-Italicc. 1500–700 BCE*findō‘to split, cleave’reconstructed
- Latinc. 75 BCE–200 CEfindō‘split, divide’
- Latin, derivedc. 75 BCE–200 CEfissiō‘the act of breaking up’
- Latin, derivedc. 75 BCE–200 CEfissiōnemaccusative singular of fissiō
- Englishtodayfission
Linked words
through Proto-Indo-European *bʰeyd- ‘to split’
bet, boat, bite, bitter, bait, fiber, fibre, abet, 26 more
through Latin findō ‘split, divide’
Today it means
noun The process whereby one item splits to become two.
Language periods are conventional ranges, not dates for this word.
Etymograph / Proto-Indo-European *bʰeyd- / fission