SG Heritage Dictionary

Natant [Adjective] Webster's Dictionary 1828

In botany, swimming; floating on the surface of water; as the leaf of an aquatic plant.

Natant [Adjective] Webster's Dictionary 1913

1. Floating in water, as the leaves of water lilies, or submersed, as those of many aquatic plants.

2. Placed horizontally across the field, as if swimmimg toward the dexter side; said of all sorts of fishes except the flying fish.

Natantly [Adverb] Webster's Dictionary 1913

In a floating manner; swimmingly.