IPA: /ˌkɛm.əˈtroʊ.pɪ.zəm/
KK: /kɛməˈtroʊpɪzəm/
The movement or growth of a living thing in response to a chemical substance.
Plants exhibit chemotropism by growing towards nutrients in the soil.
Chemotropism → It is formed from "chemo-" (from Greek "chēmeia", meaning chemistry or chemical) and "tropism" (from Greek "tropos", meaning a turning or change). The word describes the growth or movement of an organism in response to a chemical stimulus, indicating a turning towards or away from chemicals.
Think of 'chemicals' ('chemo-') causing a 'turning' or change ('tropism') in an organism's growth or movement.