tropism

Definitions of tropism
1

n an involuntary orienting response; positive or negative reaction to a stimulus source

Types:
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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
Type of:
reaction, response
a bodily process occurring due to the effect of some antecedent stimulus or agent

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