The Collaborative International Dictionary of English v.0.48:

Glasswork \Glass"work`\, n.
   Manufacture of glass; articles or ornamentation made of
   glass.
   [1913 Webster]

WordNet (r) 3.0 (2006):

glasswork
    n 1: an article of tableware made of glass [syn: glassware,
         glasswork]