# deficiency

> English word · Noun · IPA /dɪˈfɪʃənsi/ · frequency rank #12,220

## Definitions
1. Inadequacy or incompleteness.
2. An insufficiency, especially of something essential to health.
3. The amount by which the number of double points on a curve is short of the maximum for curves of the same degree.
4. The codimension of a linear system in the corresponding complete linear system.

## Etymology
From deficient + -cy. Compare Latin dēficientia.

## Easily confused with
- **deficient** (https://plainspell.com/en/vs/deficiency-vs-deficient)

## Common misspellings (15)
`ddeficiency`, `defciiency`, `defficiency`, `deficciency`, `deficeincy`, `deficiecny`, `deficienccy`, `deficiencyy`, `deficienncy`, `deficienyc`, `deficinecy`, `defiicency`, `deifciency`, `dfeiciency`, `edficiency`

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