dimethoxyphenylethylamine UK /ˌdaɪmɛθˌɒksiˌfɛnəlˌɛθəlˈæmiːn/US /ˌdaɪmɛθˌɑːksiˌfɛnəlˌɛθəlˈæmiːn/ noun1 •Any dimethoxy derivative of phenylethylamine, some of which have biochemical action formsdimethoxyphenylethylamines