3) In hardware design, a prototype is a hand-built model that represents a manufactured (easily replicable) product sufficiently for designers to visualize and test the design. The word prototype comes from the Latin words proto, meaning original, and typus, meaning form or model.
In chemistry, a salt is an ionic compound which is made up of two groups of oppositely charged ions. The ion with a positive charge is called a cation, and the one with a negative charge is called an anion.
: a soluble salt obtained from the ashes of plants and consisting largely of potassium or sodium carbonate; broadly: a substance (as a hydroxide or carbonate of an alkali metal) having marked basic properties â compare base 7a. a substance that has a bitter taste and reacts with an acid to form a salt: base. 2. : a salt or a mixture of salts sometimes found in large amounts in the soil of dry regions.