n. pl. ham·a·dry·ads or ham·a·dry·a·des (-ə-dēz′)
1. Greek & Roman Mythology A wood nymph who lives only as long as the tree of which she is the spirit lives.
2. See king cobra.
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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.