agrin /əˈɡɹɪn/adjective 1/ˈæ.ɡɹɪn/ noun 1forms 1 adjective[after a verb]1 •Grinning; having happiness or satisfaction apparent on one's face. agrin /ˈæ.ɡɹɪn/ noun1 •a protein involved in the formation of neuromuscular junctions during embryonic development formsagrins
