Chem`o*tax"is (?), n. Formerly also Chem`i*o*tax"is. [Chemical + Gr. &?; arrangement, fr. &?; to arrange.] (Biol.)
The sensitiveness exhibited by small free-swimming organisms, as bacteria, zoöspores of algæ, etc., to chemical substances held in solution. They may be attracted (positive chemotaxis) or repelled (negative chemotaxis). -- Chem`o*tac"tic (#), a. -- Chem`o*tac"tic*al*ly, adv.
© Webster 1913