IPA: /ˌkiːmoʊˈtæksɪs/
KK: /kɛmoʊˈtæksɪs/
The movement of an organism or cell in response to a chemical signal, either moving towards or away from it.
Bacteria use chemotaxis to find food sources in their environment.
Chemotaxis is formed from "chemo-" (from Greek "chēmeia", meaning chemistry or chemical) and "taxis" (from Greek "taxis", meaning arrangement or order). The word describes the movement of an organism in response to a chemical stimulus, indicating how it arranges itself in relation to chemicals.
Think of 'chemicals' ('chemo-') guiding the 'arrangement' ('taxis') of organisms — that's how chemotaxis means movement in response to chemicals.