[yoo-trof-ik, -troh-fik]
Medicine/Medical. pertaining to or being in a condition of eutrophy.
Ecology. (of a lake) characterized by an abundant accumulation of nutrients that support a dense growth of algae and other organisms, the decay of which depletes the shallow waters of oxygen in summer.

1880–85; eutroph(y) + -ic

eutrophication, noun Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
eutrophic (juːˈtrɒfɪk, -ˈtrəʊ-)
Compare oligotrophic (of lakes and similar habitats) rich in organic and mineral nutrients and supporting an abundant plant life, which in the process of decaying depletes the oxygen supply for animal life
[C18: probably from eutrophy, from Greek eutrophia sound nutrition, from eutrophos well-fed, from eu- + trephein to nourish]

eutrophication (juːˌtrɒfɪˈkeɪʃən)
a process by which pollution from such sources as sewage effluent or leachate from fertilized fields causes a lake, pond, or fen to become overrich in organic and mineral nutrients, so that algae and cyanobacteria grow rapidly and deplete the oxygen supply

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American Heritage
Medical Dictionary

eutrophic eu·troph·ic (yōō-trŏf'ĭk, -trō'fĭk)
Relating to, characterized by, or promoting eutrophia.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
eutrophic  [%PREMIUM_LINK%]     (y-trŏf'ĭk, -trō'fĭk)  Pronunciation Key 
Having waters rich in phosphates, nitrates, and organic nutrients that promote a proliferation of plant life, especially algae. Used of a lake, pond, or stream. Compare dystrophic, oligotrophic.

eutrophication   (y-trŏf'ĭ-kā'shən)  Pronunciation Key 
The process by which a lake, pond, or stream becomes eutrophic, typically as a result of mineral and organic runoff from the surrounding land. The increased growth of plants and algae that accompanies eutrophication depletes the dissolved oxygen content of the water and often causes a die-off of other organisms.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
Nutrient-rich discharges cause eutrophication or overgrowth of algae.
Intended to promote the growth of plants, fertilizers also encourage the growth of algae, called eutrophication.
Nutrient pollution-known as eutrophication-is the primary cause of those zones created by humans.
Eutrophication is when a lake gets too many nutrients, causing blue-green algae
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