Source : Webster's Revised Unabridged Dictionary (1913)

Water pore \Wa"ter pore`\,
   1. (Zo["o]l.) A pore by which the water tubes of various
      invertebrates open externally.

   2. (Bot.) One of certain minute pores in the leaves of some
      plants. They are without true guardian cells, but in other
      respects closely resemble ordinary stomata. --Goodale.

Source : WordNet®

water pore
     n : a pore that exudes water on the surface or margin of a leaf
         of higher plants [syn: {hydathode}, {water stoma}]