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Definition of: chemotaxis
(kem′ō·tak′sis) noun Biol.
The property which certain motile living cells possess of approaching (positive chemotaxis) or moving away from (negative chemotaxis) chemical substances: also called chemotropism. [<CHEMO-+ Gk. taxis order <tattein arrange]
—chem′o·tac′tic (-tak′tik) adjective
—chem′·o·tac′ti·cal·ly adverb
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