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.
(Chem.) Relating to a base; performing the office of a base in a salt. 2. (Min.) Said of crystalline rocks which contain a relatively low percentage of silica, as basalt. Basic salt. (Chem.) a salt formed from a base or hydroxide by the partial replacement of its hydrogen by a negative or acid element or radical.