PHILADELPHUS Meaning of PHILADELPHUS in English [ ˌfɪlə'dɛlfəs ]■ noun a mock orange.OriginC18: mod. L. (adopted by Linnaeus as a genus name), from Gk philadelphos 'loving one's brother'. Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004