noun one of a group of butterflies. ·see nymph.
2. naiad ·noun any plant of the order naiadaceae, such as eelgrass, pondweed, ·etc.
3. naiad ·noun any species of a tribe (naiades) of freshwater bivalves, including unio, anodonta, and numerous allied genera; a river mussel.
4. naiad ·noun 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.