excretions - Definitions from Dictionary.com

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Excretions
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American Heritage Dictionary - Cite This Source - Share This

ex·cre·tion Audio Help (ĭk-skrē'shən) Pronunciation Key
n.

The act or process of discharging waste matter from the blood, tissues, or organs.
The matter, such as urine or sweat, that is so excreted.

The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2006 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.

Encyclopædia Britannica, Inc.
excretions

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The American Heritage Science Dictionary - Cite This Source - Share This

excretion Audio Help (ĭk-skrē'shən) Pronunciation Key
The elimination by an organism of waste products that result from metabolic processes. In plants, waste is minimal and is eliminated primarily by diffusion to the outside environment. Animals have specific organs of excretion. In vertebrates, the kidney filters blood, conserving water and producing urea and other waste products in the form of urine. The urine is then passed through the ureters to the bladder and discharged through the urethra. The skin and lungs, which eliminate carbon dioxide, are also excretory organs.

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