NAIAD

noun (plural ~s or ~es) see: nourish Date: 14th century any of the nymphs in classical mythology living in and giving life to lakes, rivers, springs, and fountains, an aquatic insect nymph (as of a mayfly, dragonfly, damselfly, or stone fly), any of a genus ( Najas of the family Najadaceae) of submerged aquatic plants