Czechoslovakian

Czechoslovakian

prop. adj.
  1. Of or pertaining to Czechoslovakia. Since the dissolution of Czechoslovakia into the Czech republic and Slovakia in January 1993, this term no longer refers to any current country.
  2. Of, pertaining to, or characteristic of the inhabitants of Czechoslovakia or the Czech Republic; as, the Czech population.

Czechoslovakian

prop. n.
  1. a native or inhabitant of Czechoslovakia. Since the dissolution of Czechoslovakia into the Czech republic and Slovakia in January 1993, this term no longer refers to a citizen of any current country. The natives of the former Czechoslovakia are now Czechs or Slovaks.