a. [ From Buoy, v. t. & i. ] 1. Having the quality of rising or floating in a fluid; tending to rise or float; as, iron is buoyant in mercury. “Buoyant on the flood.” Pope. [ 1913 Webster ]
2. Bearing up, as a fluid; sustaining another body by being specifically heavier. [ 1913 Webster ]
The water under me was buoyant. Dryden. [ 1913 Webster ]