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geotropism

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geotropism


  2  definitions  found 
 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
 
  Geotropism  \Ge*ot"ro*pism\,  n.  [Gr.  ge`a,  gh^,  the  earth  +  ?  to 
  turn.]  (Biol.) 
  A  disposition  to  turn  or  incline  towards  the  earth;  the 
  influence  of  gravity  in  determining  the  direction  of  growth 
  of  an  organ. 
 
  Note:  In  plants,  organs  which  grow  towards  the  center  of  the 
  earth  are  said  to  be  positively  geotropic,  and  those 
  growing  in  the  opposite  direction  negatively  geotropic. 
  In  animals,  geotropism  is  supposed  by  some  to  have  an 
  influence  either  direct  or  indirect  on  the  plane  of 
  division  of  the  ovum. 
 
  From  WordNet  r  1.6  [wn]: 
 
  geotropism 
  n  :  an  orienting  response  to  gravity 




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