scionEnglishOxford English Thesaurusscion noun 1 the process involves grafting a scion of the chosen tree on to rootstock of the same species: cutting, graft, slip; shoot, offshoot, twig. 2 the scion of an aristocratic Massachusetts family: descendant, offshoot; heir, successor; child, issue, offspring. ▷antonyms ancestor, predecessor.scion Oxford Dictionary of English