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• Beach well: a water well located on the seashore near the ocean.
• Desalination: a process that removes excess salt and other minerals from water mainly used for drinking water.
• Energy recovery device: a piece of equipment (or a tool) that takes the high pressure reject water that is leaving the reverse osmosis process and uses it to pressurize water that is just entering the process. This transfer of pressure “recovers” the energy and reuses it instead of wasting it.
• Intake: a big, long pipe (up to several thousand meters) buried under the sand and extending into the ocean to collect sea water that will be treated for drinking water using the reverse osmosis process.
• Membrane: a thin layer of plastic material that acts like a one-way street to allow the salt to flow through to one side but not return to the other.
• Permeate: water purified by reverse osmosis treatment, sometimes called product water or drinking water.

• Potable: a term that describes water that is safe for drinking.
• Pre-treatment: a method used to remove larger things (also known as particles) from the water, like sand and mud, before it goes into the reverse osmosis process.
• Reverse Osmosis (RO): a desalination process used to filter water. The water is pressurized to a high pressure, forcing the smaller water molecules through a filter called a membrane. The water that goes through the membrane leaves as "drinking" water. The water that does not go through the membrane contains salt and other impurities and leaves the process in a slightly concentrated reject stream that is still at a very high pressure.
• Salinity: saltiness or dissolved salt content in a body of water. The technical term for saltiness in the ocean is salinity. The amount of salinity is measured by “ppm,” which means parts per million.