heliotropism

2 definitions found

heliotropism - Collaborative International Dictionary of English v.0.48 :

  Heliotropism \He`li*ot"ro*pism\, n. [Helio- + Gr. ? to turn.]
     (Bot.)
     The phenomenon of turning toward the light, seen in many
     leaves and flowers.
     [1913 Webster]

heliotropism - WordNet (r) 2.1 (2005) :

  heliotropism
      n 1: an orienting response to the sun