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di·e·sis

(dīĭ-sĭs)

n. pl. di·e·ses (-sēz′)

See double dagger.

[Medieval Latin, semitone (which was indicated by a double dagger), from Latin, quarter tone, from Greek, a letting through, from diīenai, to send through : dia-, dia- + hīenai, to send; see yē- in the Appendix of Indo-European roots.]

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:

Indo-European Roots

Semitic Roots

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.

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