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.
1. uncountable noun. Salt is a strong-tasting substance, in the form of white powder or crystals, which is used to improve the flavour of food or to preserve it. Salt occurs naturally in sea water. Season lightly with salt and pepper. ...a pinch of salt.