An alternate spelling or form of demarcation; a clear boundary or line of division.
From demark + -ation (noun suffix). This spelling preserves the 'k' from mark before the suffix, while demarcation uses the French-influenced 'c'.
Demarkation and demarcation are spelling variants—English let both survive, which is why historians might find both versions in old documents, showing how spelling wasn't standardized until recently.
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