eutrophic
Concise Oxford English Dictionary © 2008 Oxford University Press:
eutrophic /juːˈtrəʊfɪk, -ˈtrɒfɪk/
▶adjective Ecology (of a body of water) rich in nutrients and so supporting a dense plant population, the decomposition of which kills animal life by depriving it of oxygen.
– derivatives
eutrophicate verb,
eutrophication noun.
eutrophicate verb,
eutrophication noun.
– origin C18: from Gk eutrophia, from eu ‘well’ + trephein ‘nourish’.
'eutrophic' also found in these Oxford entries:

