different between alphamosaics vs alphamosaic

English

From alphabetical and mosaic, perhaps modelled on alphanumerics or similar.

alphamosaics (uncountable)

A display made up of text characters combined with simple block graphics, as used in certain videotex systems.

Blend of alphabetical +? mosaic.

alphamosaic (not comparable)

Of or pertaining to alphamosaics.
- 1981, New Scientist
  The two European systems use an "alphamosaic" method of delivering data to a viewdata terminal screen.

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