Swedish edit

 
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Etymology edit

From millennium +‎ -e- +‎ bugg.

Noun edit

millenniebugg c

  1. (computing, in the definite "millenniebuggen") the millennium bug, the Y2K bug

Declension edit

Declension of millenniebugg 
Uncountable
Indefinite Definite
Nominative millenniebugg millenniebuggen
Genitive millenniebuggs millenniebuggens