rose chestnut: handsome East Indian evergreen tree often planted as an ornamental for its fragrant white flowers that yield a perfume; source of very heavy hardwood used for railroad ties
tree: a tall perennial woody plant having a main trunk and branches forming a distinct elevated crown; includes both gymnosperms and angiosperms
unidentified flying object: an (apparently) flying object whose nature is unknown; especially those considered to have extraterrestrial origins