Hydrotropism

1 definition found

From The Collaborative International Dictionary of English v.0.48 [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.]