Source : Webster's Revised Unabridged Dictionary (1913)

Disbud \Dis*bud"\, v. t. [See {Bud}, v.] (Hort.)
   To deprive of buds or shoots, as for training, or economizing
   the vital strength of a tree.

Source : WordNet®

disbud
     v 1: thin out buds to improve the quality of the remaining
          flowers
     2: destroy undeveloped horn buds (of cattle)
     [also: {disbudding}, {disbudded}]