·noun One of a group of butterflies. ·see Nymph.
II. Naiad ·noun Any plant of the order Naiadaceae, such as eelgrass, pondweed, ·etc.
III. Naiad ·noun Any species of a tribe (Naiades) of freshwater bivalves, including Unio, Anodonta, and numerous allied genera; a river mussel.
IV. 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.