genitive

Short definition from Wiktionary

Adjective

1. 1
   Of or pertaining to the generation of offspring; generative, procreative, reproductive.
2. 2
   Of a grammatical case: in an inflected language (such as Greek or Latin), expressing that a thing denoted by a word is related to a thing denoted by another word as its origin or possessor; and in an uninflected language (such as English), expressing origin or possession; possessive.
3. 3
   Of, pertaining to, or used in the genitive case.

Noun

1. 1
   Ellipsis of genitive case (“a grammatical case used to express a relationship of origin or possession”).
2. 2
   A word inflected in the genitive case, and which thus indicates origin or possession.