loc·a·tive 
(lŏkə-tĭv)
(lŏkə-tĭv)adj.
Of, relating to, or being a grammatical case in certain inflected languages that indicates place in or on which or time at which, as in Latin domī, "at home."
n.
1. The locative case.
2. A form or construction in the locative case.
[New Latin locātīvus, from Latin locātus, past participle of locāre, to place; see LOCATE.]