'positive hydrotropism' definitions:

Definition of 'positive hydrotropism'

From: GCIDE
  • Hydrotropism \Hy*drot"ro*pism\, n.
  • 1. (Bot.) A tendency towards moisture. [1913 Webster]
  • 2. (Bot.) In a broader sense, any curvature or turning induced in certain growing plant organs under the influence of moisture.
  • Note: 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}. [Webster 1913 Suppl.]