Having to do with foreigners. / Relating to strangers or strangeness. / From a foreign place. / (biology, medicine, transplantation) From a donor of another species. / Of extraterrestrial origin.

Of or pertaining to xenobiosis. / (biology) Relating to a substance foreign to the body or ecological system.

(biology) Any foreign compound not produced by an organism's metabolism.

The killing of a stranger or foreigner. / (science fiction) The genocide of an entire alien species. / (US, colloquial) The intentional killing of an entire foreign (plant or animal) species.

Of, relating to, or advocating xenocentrism.

The belief that the products, styles, or ideas of another society are better than those of one's own culture.

(science fiction) A fictional science, concerned with the physical remains of alien cultures. These may be found on planets which have been inhabited or visited by extraterrestrials.

The speculative biology of extraterrestrial life forms. / The biology of life forms with non-standard biochemistry or codes.

plural of xenobiotic

A crystal forming in a metamorphic rock that has not developed its characteristic crystalline faces and which gets its shape from bordering crystals.