Meanings
adjectivesesquilinear (not comparable)
- not comparablemathematics(of a map of a complex vector space) Linear in one coordinate and conjugate linear in the other
Origin
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”).
Full word history & related roots →Translations
Polish półtoraliniowy
- półtoraliniowy(mathematics) linear in one variable and conjugate linear in the other
Spanish sesquilineal
- sesquilineal(mathematics) linear in one variable and conjugate linear in the other
Cite this entry
APA
sesquilinear. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/sesquilinear
MLA
“sesquilinear.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/sesquilinear. Accessed November 4, 2026.
Chicago
WatkinsX Dictionary, s.v. “sesquilinear,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/sesquilinear.
Source: sesquilinear on Wiktionary, CC BY-SA 4.0.