Ge*ot"ro*pism (?), n. [Gr.
ge`a, gh^, the earth + &?; to turn.]
(Biol.) A disposition to turn or incline towards the
earth; the influence of gravity in determining the direction of
growth of an organ.
&fist; In plants, organs which grow towards the center of the
earth are said to be positively geotropic, and those growing
in the opposite direction negatively geotropic. In animals,
geotropism is supposed by some to have an influence either direct or
indirect on the plane of division of the ovum.