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.
Medical Definition of Saline. Saline: Relating to salt. As an adjective, saline means salty, containing salt.. As a noun saline is a salt solution, often adjusted to the normal salinity of the human body. Salt, in medicine, is referring to sodium chloride.