**Science / Chemistry / Kilogram:** The kilogram (kg) is the base unit of mass in the SI system of units. The standard kilogram is a 1 kg corrosion resistant platinum/iridium cylinder, carefully preserved in the suburbs of Paris (with a backup copy kept in Gaithersburg, Maryland.) Efforts are underway to replace these artifacts by redefining the kilogram as the mass of a certain number of silicon atoms.

Health / Vitamins / Kilogram (Kg): Unit of measurement of mass. 1 kilogram is equivalent to 2.2 pounds. MORE

Science / Tides and Currents / Salinity (S): The total amount of solid material in grams contained in 1 kilogram of sea water when all the carbonate has been converted to oxide, the bromine and iodine replaced by chlorine, and all organic matter MORE

Science / Tides and Currents / Geopotential: The unit of geopotential difference, equal to the gravity potential of 1 meter squared per second squared, m2 / s2, or 1 joule per kilogram, J / kg. MORE