Geotropism

[dʒi'ɒtrәpizm]

(noun.) an orienting response to gravity.

Edited by Erna--From WordNet

(n.) A disposition to turn or incline towards the earth; the influence of gravity in determining the direction of growth of an organ.

Edited by Karl

n. (bot.) tendency to growth downward.—adj. Geotrop′ic.

Editor: Pratt