English
ratio
Ratio is borrowed from Latin ratiō ‘reckoning, reason’.
attested reconstructed ? uncertain or disputed deepest recorded ancestor
- 1 Wiktionary, English ratio
- Earliest quotation in Wiktionary’s entry: 2019, Susan Scutti, Climate change will affect gender ratio among newborns, scie: “Scientists believe that the sex ratio is equal at…”.
Lineage
- Latinc. 75 BCE–200 CEratiōWiktionary, English ratio‘reckoning, reason’
- Englishearliest quotation 2019ratioWiktionary, English ratio. Earliest quotation in Wiktionary’s entry: 2019, Susan Scutti, Climate change will affect gender ratio among newborns, scie: “Scientists believe that the sex ratio is equal at…”
Word family
English words that share an ancestor with ratio, grouped by the ancestor they share, most familiar first.
through Proto-Indo-European *h₂er- ‘to fit, to fix, to put together, to slot’
- order ← ordre ← ordne ← ōrdinem ← *ordō
- art ← artem ← ars ← *artis ← *h₂értis
- ready ← redy
- army ← armee ← armee ← armātus ← armō
- article ← articulus ← artus ← *h₂értus
- arm ← earm ← *armaz ← *h₂érmos
- artist ← artiste ← artista ← ars ← *artis
- ordinary ← ordenarie ← ordinaire ← ordinarius ← ōrdō
- alarm ← alarme ← alarme
- harmony ← armonye ← harmonie ← harmonia ← ἁρμονία
- armor ← armure ← armure ← armeure ← armātūra
- coordinate ← coōrdinātus ← ōrdinō ← ōrdō ← *ordō
139 more relatives in the full family tree
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Today it means
noun A number representing a comparison between two named things.
Sources
Sources: Wiktionary, “ratio”. By Wiktionary contributors, CC BY-SA 4.0, via kaikki.org (dump of Oct 3 2026); text adapted and restructured. Language periods are conventional ranges, not dates for this word. License.
Etymograph / Latin ratiō / ratio