You searched for: “oxytropism”
oxytropism (s) (noun) (no pl)
An orientational response to an oxygen gradient stimulus: By using containers with good soil for growing plants, oxytropsm enables roots to avoid soil that is devoid of oxygen.
This entry is located in the following units: -ism, -ismus (page 40) oxy-, -oxia, -oxic (page 6)