naiad

One of the nymphs who lived in and presided over brooks, springs, and fountains.

The aquatic nymph of certain insects, such as a mayfly, damselfly, or dragonfly.

Any of various aquatic plants of the genus Najas.

In Greek and Roman mythology, a water-nymph; a female deity presiding over springs and streams.

In botany, a plant of the genus Naias; also, sometimes, any plant of the Naiadaceæ.

One of the naiades or pearly fresh-water mussels; a fresh-water mollusk as distinguished from an oceanid or marine mollusk.

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.

Any species of a tribe (Naiades) of freshwater bivalves, including Unio, Anodonta, and numerous allied genera; a river mussel.

One of a group of butterflies. See Nymph.

Any plant of the order Naiadaceæ, such as eelgrass, pondweed, etc.