phototropism
noun
pho·tot·ro·pism
| \ fō-ˈtä-trə-ˌpi-zəm
\
\
Definition of phototropism
: a tropism in which light is the orienting stimulus
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More Definitions for phototropism
phototropism
noun
pho·tot·ro·pism
| \ fō-ˈtä-trə-ˌpiz-əm
, ˌfōt-ō-ˈtrō-ˌpiz-əm
\
, ˌfōt-ō-ˈtrō-ˌpiz-əm
\
Medical Definition of phototropism
: a tropism in which light is the orienting stimulus — see heliotropism
2
: the reversible change in color of a substance produced by the formation of an isomeric modification when exposed to radiant energy (as light)