from The American Heritage® Dictionary of the English Language, 4th Edition
- n. Greek Mythology A nymph whose unrequited love for Narcissus caused her to pine away until nothing but her voice remained.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- proper n. A taxonomic genus within the family Calopterygidae — A genus of damselfly.
- n. The letter E in the ICAO spelling alphabet.
- proper n. An oread, punished by Hera by losing her own voice and only being able to mimic that of others.
From Ancient Greek Ἠχώ (Ēkhō, "sound"). (Wiktionary)