capacitor(n = noun.artifact) capacitance, condenser, electrical condenser - an electrical device characterized by its capacity to store an electric charge;
is a kind of electrical device
is a part of circuit, electric circuit, electrical circuit, distributer, distributor, electrical distributor
has particulars: bypass capacitor, bypass condenser, electrolytic, electrolytic capacitor, electrolytic condenser, leiden jar, leyden jar, trimmer, trimming capacitor

   a device used in electronic circuits to hold electrical charge, consisting of two conducting plates separated by a nonconducting (dielectric) medium; it is characterized by its capacitance. [WordNet 1.5]

capacitor, n. Electr. a device of one or more pairs of conductors separated by insulators used to store an electric charge.

bypass capacitor, capacitor microphone, electrolytic capacitor, trimming capacitor