'palimony' definitions:

Definition of 'palimony'

noun

Support paid by one half of an unmarried partnership after the relationship ends

From: GCIDE

palimony \pal"i*mo`ny\ (p[a^]l"[i^]*m[=o]`n[y^]), n. [pal + alimony. (ca. 1975)] a form of alimony paid to a former partner in a romantic relationship after a period of living together, even though the two persons involved were not married to each other. The absence of a formal marriage distinguishes it from alimony. [PJC]