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Hydrot"ropism (), n.(Bot.) A tendency towards moisture.
Hydrot"ropism n.(Bot.) In a broader sense, any curvature or turning induced in certain growing plant organs under the influence of moisture. When the movement is toward the moisture, as is the case in most roots, the phenomenon is called positive hydrotropism; when away from the moisture, as in the case of hyphae of certain fungi, negative hydrotropism.
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