A first or preliminary model of something, esp. a machine, from which other forms are developed or copied
A typical example of something
The archetypal example of a class of living organisms, astronomical objects, or other items
A building, vehicle, or other object that acts as a pattern for a full-scale model
A basic filter network with specified cutoff frequencies, from which other networks may be derived to obtain sharper cutoffs, constancy of characteristic impedance with frequency, etc