Pronunciation: ' plü-st ə n, - ˌ stän
Function: noun
Etymology: International Scientific Vocabulary pleus- (irreg. from Greek plein to sail, float) + -on (as in plankton )
Date: 1943
: organisms living in the thin surface layer existing at the air-water interface of a body of water
– pleus · ton · ic \ plü- ' stä-nik \ adjective