a first or preliminary version of a device or vehicle from which other forms are developed

the firm is testing a prototype of the weapon

a basic filter network with specified cut-off frequencies, from which other networks may be derived to obtain sharper cut-offs, constancy of characteristic impedance with frequency, etc.

the construction of bandpass networks from low-pass prototypes

make a prototype of (a product)

Mercedes is prototyping a car sunroof which changes from clear to tinted