bio-chemical oxygen demand

biochemical oxygen demand

noun
the oxygen required by aerobic organisms, as those in sewage, for metabolism. Abbreviation: BOD


Origin:
1925–30

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World English Dictionary
biochemical oxygen demand
 
n
BOD a measure of the organic pollution of water: the amount of oxygen, in mg per litre of water, absorbed by a sample kept at 20°C for five days

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

biochemical oxygen demand n.
The amount of oxygen required by aerobic microorganisms to decompose the organic matter in a sample of water and used as a measure of the degree of water pollution. Also called biological oxygen demand.

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
biochemical oxygen demand   (bī'ō-kěm'ĭ-kəl)  Pronunciation Key 
The amount of oxygen required by aerobic microorganisms to decompose the organic matter in a sample of water, such as one polluted by sewage. It is used as a measure of the degree of water pollution.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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