# sesquilinear

> English word · Adjective

## Definitions
1. (of a map of a complex vector space) Linear in one coordinate and conjugate linear in the other

## Etymology
From sesqui- (“one and a half”) + linear; “conjugate linear” being considered metaphorically “half linear”, hence one and a half times linear, as opposed to bilinear (“linear in both variables”).

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