Plural form of calpac; multiple tall cylindrical Ottoman or Central Asian caps.
Alternative plural spelling of 'calpack' using the earlier 'calpac' spelling variant. Both 'calpacs' and 'calpacks' were used interchangeably in historical English.
The existence of two spelling variants ('calpacs' and 'calpacks') in the same historical period shows that English was still in the process of standardizing borrowed words from non-Latin-alphabet languages.
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