BioScience Dictionary

 
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Found No observed effect level 1 time.

Displaying results 1 to 10.

1. No observed effect level (NOEL)
This is the greatest concentration or amount of a chemical found by experiment or observation that causes no detectable adverse alteration of morphology , functional capacity, growth, development, or life span of the target organism. The maximum dose or ambient concentration which an organism can tolerate over a specified period of time without showing any detectable adverse effect and above which adverse effects are apparent. See adverse effect .