prototypes >> /ˈprəʊtətʌɪp/
Definition: [verb] Make a prototype of (a product)
Example: Mercedes is prototyping a car sunroof which changes from clear to tinted
Definition: [noun] A first or preliminary version of a device or vehicle from which other forms are developed.
Example: the firm is testing a prototype of the weapon
Definition: [noun] 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.