ost·mark (ôstmärk′, ŏst-)
A former unit of currency in East Germany worth 100 pfennigs.
[German : Ost, east (from Middle High German ōst, ōsten, from Old High German ōstan; see aus- in the Appendix of Indo-European roots) + Mark, mark (from Middle High German marke, marc; see MARK2).]
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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.