[ol-i-goh-trof-ik, -troh-fik]
adjective Ecology.
(of a lake) characterized by a low accumulation of dissolved nutrient salts, supporting but a sparse growth of algae and other organisms, and having a high oxygen content owing to the low organic content.

1925–30; oligo- + trophic

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World English Dictionary
oligotrophic (ˌɒlɪɡəʊˈtrɒfɪk)
Compare eutrophic (of lakes and similar habitats) poor in nutrients and plant life and rich in oxygen
[C20: from oligo- + Greek trophein to nourish + -ic]

Collins English Dictionary - Complete & Unabridged 10th Edition
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Word Origin & History

1931, from Gk. oligos "small, little," + trophe "nourishment."
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Science Dictionary
oligotrophic  [%PREMIUM_LINK%]     (ŏl'ĭ-gō-trō'fĭk, -trŏf'ĭk, ō'lĭ-)  Pronunciation Key 
Lacking in plant nutrients such as phosphates, nitrates, and organic matter, and consequently having few plants and a large amount of dissolved oxygen throughout. Used of a lake, pond, or stream. Compare dystrophic, eutrophic.

The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
Heterotrophic bacterial growth and nutrient limitation in large, oligotrophic lakes and oceans.
Over its lifetime, a lake progresses from a more oligotrophic to a more eutrophic state.
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