tropism

1. An involuntary orienting response;
   Positive or negative reaction to a stimulus source (synset 100863289)
   is a type of: reaction, response - a bodily process occurring due to the effect of some antecedent stimulus or agent
   subtypes:

   • ergotropism - an affinity for work
   • geotropism - an orienting response to gravity
   • heliotropism - an orienting response to the sun
   • meteortropism - an effect of climate on biological processes (as the effect on joint pains etc.)
   • neurotropism - an affinity for neural tissues
   • phototropism - an orienting response to light
   • trophotropism - an orienting response to food
   • thermotropism - an orienting response to warmth

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