heliotropism


he·li·ot·ro·pism

noun \ˌhē-lē-ˈä-trə-ˌpi-zəm\

Definition of HELIOTROPISM

:  phototropism in which sunlight is the orienting stimulus
he·lio·tro·pic \-lē-ə-ˈtrō-pik, -ˈträ-\ adjective

First Known Use of HELIOTROPISM

circa 1854

he·li·ot·ro·pism

noun \ˌhē-lē-ˈä-trə-ˌpiz-əm\   (Medical Dictionary)

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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