Source : Webster's Revised Unabridged Dictionary (1913)

   {Queen apple}. [Cf. OE. quyne aple quince apple.] A kind of
      apple; a queening. ``Queen apples and red cherries.''
      --Spenser.

   {Queen bee} (Zo["o]l.), a female bee, especially the female
      of the honeybee. See {Honeybee}.

Source : WordNet®

queen bee
     n : fertile egg-laying female bee