auxotonic

/AA0 G Z AH0 T AA1 N IH0 K/
adjective
  1. 1

    (physiology) Of or involving muscular contraction against resistance in which the length of the muscle changes and the tension differs due to an increasing load or difference in leverage.

  2. 2

    (botany) Relating to plant movement classified by growth as opposed to mature reactions to exogenous stimuli in surrounding environment.