genitive
adjective
gen·i·tive ˈje-nə-tiv 
1
: of, relating to, or being a grammatical case (see case entry 1 sense 3a) that typically marks a person or thing that possesses someone or something else or the source from which someone or something comes compare possessive
2
: expressing a relationship that in some inflected languages is often marked by a genitive case —used especially of English prepositional phrases introduced by of
genitive noun
Word History
Etymology
Middle English, from Latin genetivus, genitivus, literally, of generation (erroneous translation of Greek genikos genitive), from genitus
First Known Use
14th century, in the meaning defined at sense 1