Search Result for "thermotropism": 
Wordnet 3.0

NOUN (1)

1. an orienting response to warmth; 



The Collaborative International Dictionary of English v.0.48:

Thermotropism \Ther*mot"ro*pism\, n. [Thermo- + Gr. ? to turn.]
   (Bot.)
   The phenomenon of turning towards a source of warmth, seen in
   the growing parts of some plants.
   [1913 Webster]


WordNet (r) 3.0 (2006):

thermotropism
    n 1: an orienting response to warmth