Εννοια

• Noun

  1. A layer of impurities that accumulates at the surface of a liquid (especially molten metal or water).
  2. A greenish water vegetation (such as algae), usually found floating on the surface of ponds
  3. The topmost liquid layer of a cesspool or septic tank.
  4. (slang) Semen.
  5. (slang) A reprehensible person or persons.

• Verb