cellular telephone
— Noun
– English
～ a hand-held mobile radiotelephone for use in an area divided into small sections, each with its own short-range transmitter/receiver
Cassegrainian telescope
— Noun
– English
～ a reflecting telescope that has a paraboloidal primary mirror and a hyperboloidal secondary mirror; light is brought to a focus through an aperture in the center of the primary mirror
coude telescope
— Noun
– English
～ a reflecting telescope so constructed that the light is led to a plate holder or spectrograph
closed-circuit television
— Noun
– English
～ a television system that is not used for broadcasting but is connected by cables to designated monitors (as in a factory or theater)