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Webster 1828 Edition

Adj.

s as z. Not fused; not melted.

unfused ‎(not comparable)

Not fused; distinct
an unfused vertebra
Lacking a fuse
- 1994, Joseph Heller, Closing Time, ISBN 0671746049, page 13:
  We are sitting with smiles for the camera near a plane in early daylight on a low stack of unfused thousand-pound bombs, waiting for the signal to start up for another mission […]