XENOBIOTIC Meaning of XENOBIOTIC in English [ ˌzɛnə(ʊ)bʌɪ'ɒtɪk ]■ adjective relating to or denoting a substance that is foreign to the body or to an ecological system. ■ noun a substance of this kind. Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004