eutrophic UK /juːˈtɹɒfɪk/US /juːˈtɹɑfɪk/adjective 2noun 1forms 3 adjective2 •Being rich in nutrients and minerals and therefore having an excessive growth of algae and thus a diminished oxygen content to the detriment of other organisms. •Promoting nutrition. noun1 •A eutrophic medicine. formseutrophics · more eutrophic · most eutrophic