undertide

Thesaurus

Noun

1.

undertide - a current below the surface of a fluidundercurrenttide - the periodic rise and fall of the sea level under the gravitational pull of the moonsea purse, sea puss, sea-poose, sea-purse, sea-puss, undertow - the seaward undercurrent created after waves have broken on the shorecurrent, stream - a steady flow of a fluid (usually from natural causes); "the raft floated downstream on the current"; "he felt a stream of air"; "the hose ejected a stream of water"