Auxin

2 definitions found

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

  auxin \aux"in\ n.
     1. a substance which, in small concentrations, promotes root
        formation, bud growth, or certain other processes such as
        fruit ripening or leaf drop in plants.
        [WordNet 1.5 +PJC]



From WordNet (r) 2.0 [wn]:

  auxin
       n : a plant hormone that promotes root formation and bud growth