taxis
tax.is \'tak-s*s\ \'tak-.se-z\ n or tax.es [Gk, lit., arrangement, order, fr. tassein to arrange - more at TACT] pl ICS 1: the manual restoration of a displaced body part; specif : manual reduction of a hernia 2a: reflex translational or orientational movement by a freely motile and u su. simple organism in relation to a source of stimulation (as a light or a temperature or chemical gradient) 2b: a reflex reaction involving such movement