cinerariumn.

/sɪnəˈrɛːrɪəm/Etymology: Latin, in same sense; see cinerary adj., and -arium suffix.
the world > life > death > disposal of corpse > cremation > [noun] > cinerarium
1880 9 Oct. In the cemetery of Milan, near the Crematorium..a Cinerarium is to be erected.
This entry has not yet been fully updated (first published 1889; most recently modified version published online March 2018).