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Meaning of antifouling

an•ti•foul•ing

Pronunciation: (an"tē-fou'ling, an"tī-), [key]
— adj. Naut.
  1. (of a coating, process, or the like) preventing the accumulation of barnacles, algae, etc., on underwater surfaces: The makers now use an antifouling chemical on all marine hulls.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.