The Collaborative International Dictionary of English v.0.48:

patisserie \pa`tis`serie"\, Patisserie \P[^a]`tis`serie"\, n.
   [F. p[^a]tisserie. See Pate.]
   1. Pastry. --Sterne.
      [Webster 1913 Suppl.]

   2. a shop selling mostly pastries; a pastry shop.
      [PJC]

WordNet (r) 3.0 (2006):

patisserie
    n 1: a bakery specializing in French pastry