An ankle-length garment with a close-fitting waist and sleeves, worn by the clergy and others assisting in church services.
[French casaque, long military coat, from Middle French, probably originally meaning "Cossack coat" and ultimately (probably via Old Russian kozakŭ, free man, Cossack) and of Turkic origin; akin to Tatar qazaq, free man, adventurer, and Kazakh qazaq, Kazakh; see KAZAKH.]
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Indo-European & Semitic Roots Appendices
Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:
The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.