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biotic factor

noun, Ecology
a living thing, as an animal or plant, that influences or affects an ecosystem: How do humans affect other biotic factors?
Weather is not a biotic factor because it is not alive.
Compare abiotic factor. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Contemporary definitions for biotic-factor

an influence or effect created by an organism; an effect of an organism's actions within an environment's 21st Century Lexicon
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