hydrotropic adjective. [hʌɪdrǝ(ʊ)'trǝʊpɪk, -'trɒpɪk] L19.
[from HYDRO- + -TROPIC.]
1. Botany. Exhibiting hydrotropism. L19.

2. Chemistry. Exhibiting, causing, or caused by hydrotropy. E20.

■ hydrotropically adverb (a) Botany in a manner that results in movement towards moisture; (b) Chemistry as regards hydrotropy: E20.

■ hy'drotropism noun (Botany) the property on the part of a plant root etc. of turning or bending under the influence of nearby moisture L19.

■ hy'drotropy noun (Chemistry) the phenomenon whereby a substance that is only slightly soluble in water will dissolve readily in certain aqueous solutions E20.

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