Dictionary

tropism

tropism

noun tro·pism \ˈtrō-ˌpi-zəm\

Definition of TROPISM

1
a :  involuntary orientation by an organism or one of its parts that involves turning or curving by movement or by differential growth and is a positive or negative response to a source of stimulation
b :  a reflex reaction involving a tropism
2
:  an innate tendency to react in a definite manner to stimuli; broadly :  a natural inclination :  propensity <encouraged his tropism toward the theatrical — John Updike>
tro·pis·tic \trō-ˈpis-tik\ adjective

Origin of TROPISM

International Scientific Vocabulary -tropism
First Known Use: 1899

Other Biology Terms

autochthonous, fecund, homunculus, phylogeny, substrate

tropism

noun tro·pism \ˈtrō-ˌpiz-əm\   (Medical Dictionary)

Medical Definition of TROPISM

:  involuntary orientation by an organism or one of its parts that involves turning or curving by movement or by differential growth and is a positive or negative response to a source of stimulation; also :  a reflex reaction involving a tropism
tro·pis·tic \trō-ˈpis-tik\ adjective

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