Source : Webster's Revised Unabridged Dictionary (1913)

Bud \Bud\, n. [OE. budde; cf. D. bot, G. butze, butz, the core
   of a fruit, bud, LG. butte in hagebutte, hainbutte, a hip of
   the dog-rose, or OF. boton, F. bouton, bud, button, OF. boter
   to bud, push; all akin to E. beat. See {Button}.]
   1. (Bot.) A small protuberance on the stem or branches of a
      plant, containing the rudiments of future leaves, flowers,
      or stems; an undeveloped branch or flower.

   2. (Biol.) A small protuberance on certain low forms of
      animals and vegetables which develops into a new organism,
      either free or attached. See {Hydra}.

   {Bud moth} (Zo["o]l.), a lepidopterous insect of several
      species, which destroys the buds of fruit trees; esp.
      {Tmetocera ocellana} and {Eccopsis malana} on the apple
      tree.