n. pl. ca·the·drae (-drē)
1. A bishop's official chair or throne.
2. The office or see of a bishop.
3. The official chair of an office or a position, as of a professor.
[Middle English, from Latin, chair, from Greek kathedrā : kat-, kata-, cata- + hedrā, seat; see sed- in the Appendix of Indo-European roots.]
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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.