scionPronunciation: /ˈsʌɪən/Definition of scion noun 1a young shoot or twig of a plant, especially one cut for grafting or rooting. 2a descendant of a notable family:he was the scion of a wealthy familyOrigin: Middle English: from Old French ciun 'shoot, twig', of unknown originscion in other Oxford dictionaries Definition of scion in the US English dictionary