# eccentricity

> English word · Noun · IPA /ˌɛk.sɛnˈtɹɪs.ɪ.ti/ · frequency rank #35,273

## Definitions
1. The quality of being eccentric or odd; any eccentric behaviour.
2. The ratio, constant for any particular conic section, of the distance of a point from the focus to its distance from the directrix.
3. The eccentricity of the conic section (usually an ellipse) defined by the orbit of a given object around a reference object (such as that of a planet around the sun).
4. The farthest distance from a vertex to any other vertex.

## Etymology
From eccentric + -ity.

## Common misspellings (17)
`cecentricity`, `eccenntricity`, `eccenrticity`, `eccentircity`, `eccentrciity`, `eccentriccity`, `eccentricitty`, `eccentricityy`, `eccentriciyt`, `eccentrictiy`, `eccentriicty`, `eccentrricity`, `eccenttricity`, `eccetnricity`, `eccnetricity`, `ececntricity`, `ecentricity`

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/eccentricity