Amplifier caps

What exactly is an amplifier cap?
it is a capacitor used in the circuit of an amplifier. simply put, a capacitor is an electronic device used to store temporarily an electrical charge.
Caps is short for compacitor? Boy I feel like an idiot. :-) Thanks.
The only dumb question is an unasked one.
There are DUMB questions but an HONEST question is never dumb. Sean >