English to English

noun (n)

• a device consisting of a flat or curved piece (as a metal plate) so that its surface reacts to the water it is passing through

  alat consisting dari sebuah flat atau bagian melengkung (sebagai pelat logam) sehingga permukaan bereaksi terhadap airnya sudah lewat

  Example:
  The fins of a fish act as hydrofoils.
  

  Synonym:
  foil
  

  source: wordnet30
• a speedboat that is equipped with winglike structures that lift it so that it skims the water at high speeds

  speedboat itu dilengkapi dengan winglike struktur yang mengangkatnya supaya ia mengambil air pada kecepatan tinggi

  Synonym:
  hydroplane
  

  source: wordnet30