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Definition 2024

parison ‎(plural parisons)

(glassblowing) A spherical mass of glass, rolled immediately after being taken out of the furnace.
- 2006, Thomas Pynchon, Against the Day (Vintage 2007), page 278:
  The wineglasses were from a matched dozen, each having begun as a glowing parison at the end of some blowpipe over in Murano but days before.

primary mass in glassblowing