Medical Dictionary
heliotropism
noun he·li·ot·ro·pism \ˌhē-lē-ˈä-trə-ˌpiz-əm\
Medical Definition of HELIOTROPISM
: phototropism in which sunlight is the orienting stimulus
—he·lio·tro·pic \-lē-ə-ˈtrōp-ik, -ˈträp-\ adjective
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