Autotropism

1 definition found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Autotropism \Au*tot"ro*pism\, n. [Auto- + Gr. ? to turn.] (Plant
     Physiol.)
     The tendency of plant organs to grow in a straight line when
     uninfluenced by external stimuli.
     [Webster 1913 Suppl.]