geotropism Syllabification: (ge·ot·ro·pism)Pronunciation: /jēˈätrəˌpizəm/Definition of geotropism noun Botany 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 geotropicPronunciation: /ˌjēəˈträpik, -ˈtrō-/ adjective Origin: late 19th century: from geo- 'earth' + Greek tropē 'turning' + -ismgeotropism in other Oxford dictionaries Definition of geotropism in the British & World English dictionary
