Naiad
Pronunciation : Na"iad
Part of Speech : n.
Etymology : [L. naias, -adis, na?s, -idis, a water nymph, Gr na?ade. Cf. Naid.]
Definition : 1. (Myth.)
Defn: A water nymph; one of the lower female divinities, fabled to preside over some body of fresh water, as a lake, river, brook, or fountain.
2. (Zo?l.)
Defn: Any species of a tribe (Naiades) of freshwater bivalves, including Unio, Anodonta, and numerous allied genera; a river mussel.
3. (Zo?l)
Defn: One of a group of butterflies. See Nymph.
4. (Bot.)
Defn: Any plant of the order Naiadace?, such as eelgrass, pondweed, etc.
Source : Webster's Unabridged Dictionary, 1913
Merriam-Webster's Everyday Language Reference Set: Includes: The Merriam-Webster Dictionary, The Merriam-Webster Thesaurus, and The Merriam-Webster Vocabulary Builder