geotropism

views updated

ge·ot·ro·pism / jēˈätrəˌpizəm/ • n. Bot. the growth of the parts of plants with respect to the force of gravity. The upward growth of plant shoots is an instance of negative geotropism; the downward growth of roots is positive geotropism.DERIVATIVES: ge·o·trop·ic / ˌjēəˈträpik; -ˈtrō-/ adj.

More From encyclopedia.com