- oriented growth with respect to the force of gravity.
- the response of a plant part to the stimulus of gravity. Plant stems, which grow upwards irrespective of the position in which they are placed, show negative geotropism
1874, from German Geotropismus, from geo- + Greek trope (see trope). Coined in 1868 by German botanist Albert Bernhard Frank (1839-1900). Related: Geotropic.
- The directional growth of an organism in response to gravity. Roots display positive geotropism when they grow downwards, while shoots display negative geotropism when they grow upwards. Also called gravitropism