phal·loi·dine \faˈlȯidən, ˈfaˌlȯiˌdīn\noun alsophal·loi·din\falȯidən\ (-s) Etymology: New Latin phalloides (specific epithet of the death cup Amanita phalloides) (from phall- + -oides -oid) + English -ine or -in : a very toxic crystalline peptide C35H46N8O10S.H2O obtained from the death cup mushroom