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neuston Definition

neus·ton (no̵̅o̅s′tän′, nyo̵̅o̅s′-)

noun

minute organisms, as mosquito larvae, existing in or dependent upon the surface film of a body of water

Etymology: Gr, neut. of neustos, swimming (verbal of nein, to swim < IE *(s)neu-, var. of *(s)na-, > natant)