Now updated for CSW19. New words, if any, and new inflections of existing words, are shown in red.
| aerogram | a message by wireless telegraphy. |
| beacon | a fire on high ground lit as a signal; (verb) to act as a beacon. |
| bullhorn | (US) a loudhailer. |
| cablegram | a message sent by a submarine telegraphic cable. |
| centimetric | having a wavelength between one and ten centimetres. |
| central | in the centre (noun) a telegraph exchange |
| ciphony | the electronic scrambling of voice transmissions. |
| compand | to clarify a signal by compressing then expanding volume. |
| compander | a system of transmitting or reproducing sound by compressing and then re-expanding the volume-range. |
| compandor | a system of transmitting or reproducing sound by compressing and then re-expanding the volume-range. |
| comsat | (Short for) communications satellite. |
| contraplex | having messages passing both ways simultaneously. |
| diplex | relating to the simultaneous transmission of two messages over one wire in the same direction. |
| diplexer | a device which enables two transmitters to operate simultaneously using the same aerial. |
| downlink | a transmission from a spacecraft; (verb) to transmit from a spacecraft. |
| duobinary | denoting a communications system for coding digital data. |
| duplexer | a system allowing use of the same aerial for transmission and response. |
| flir | an electronic heat sensor able to detect and display on a T.V.-like screen a distant scene despite darkness, smoke etc used esp in military aircraft. |
| genlock | a device for synchronizing locally generated signals with those received from a distance; (verb) to maintain synchronization between two signals using the genlock technique. |
| gosport | a communication device in an aeroplane. |
| helio | a signalling mirror. |
| heliogram | a message sent by reflecting the sun's rays with a mirror. |
| heliograph | an apparatus for signalling by means of a movable mirror which reflects flashes of sunshine; (verb) to signal by heliograph. |
| heliographic | relating to heliography. |
| heliographical | relating to heliography. |
| heliography | the practice of signalling by heliograph. |
| heliostat | an instrument using a mirror to reflect sunlight in a fixed direction, used for studying the sun or signalling messages. |
| heliostatic | relating to a heliostat. |
| hotline | a direct communications system for immediate contact. |
| inphase | in the same phase. |
| intercom | a type of communication system. |
| landline | a communication line on land. |
| loudhailer | a megaphone. |
| mailgram | (Tradename) a message sent electronically to the post office; (verb) to send a message by mailgram. |
| marconi | (Tradename) to communicate by wireless telegraphy. |
| marconigram | a message sent by wireless telegraphy. |
| marconigraph | a message sent by wireless telegraphy; (verb) to send a message by wireless telegraphy. |
| mase | to act as a maser, a device used to amplify long-range radar and radio astronomy signals. |
| maser | a device used to amplify long-range radar and radio astronomy signals. |
| mayday | the international radiotelephonic distress signal. |
| message | any communication sent from one person to another; (verb) to send or communicate as a message. |
| microsatellite | a very small satellite. |
| minidish | a small parabolic aerial for reception or transmission to a communications satellite. |
| minitrack | (Tradename) a satellite tracking system. |
| monopulse | a type of radar system used in gun control. |
| narrowband | operating at a narrow range of frequencies; (noun) a narrowband device. |
| passband | a frequency width that permits transmission with maximum efficiency. |
| phototelegram | a telegram that is sent by means of phototelegraphy. |
| radiolocation | position-finding by radio signals; radar. |
| radiophony | the art or practice of using the radiophone. |
| radiosonde | a radio transmitter, borne into and from upper atmosphere by balloon and parachute, sending out information on atmospheric conditions. |
| radiotelegram | a telegram sent by radio. |
| radiotelegraphy | signalling by radiotelegraph, wireless telegraphy. |
| radioteletype | a teleprinter that receives and transmits by radio. |
| rawin | a wind measurement made by tracking a balloon with radar. |
| satcom | satellite communications. |
| satellitise | to bring satellite(s) into use in (meteorology, broadcasting, etc). |
| satellitize | to bring satellite(s) into use in (meteorology, broadcasting, etc). |
| semaphore | a method of signalling with flags; (verb) to signal in this way. |
| semaphoric | related to semaphore. |
| semaphorical | related to semaphore. |
| semaphorically | (Adv.) SEMAPHORICAL, related to semaphore. |
| signal | notable (noun) an information of eg warning conveyed over a distance; (verb) to make a sign |
| signaler | (US) one who signals. |
| signaller | one who signals. |
| signally | (Adv.) SIGNAL, notable. |
| smallsat | a relatively small, inexpensive communications satellite. |
| squeg | to oscillate intermittently. |
| squegger | a squegging oscillator. |
| stopband | a band of frequencies limited by a filter. |
| subaudio | relating to low-frequency audio. No -S. |
| subcarrier | a modulated frequency used to modulate, with others, a main carrier wave. |
| syncom | one of a series of communication satellites in a synchronous orbit. |
| tannoy | (Tradename) a public announcement system; (verb) to announce by tannoy. |
| telautographic | relating to telautography. |
| telautography | transmission by use of a Telautograph, a telegraph for reproducing the movement of a pen or pencil and so transmitting writings or drawings. |
| telecopy | a message or document sent by fax. |
| telefax | a fax, a facsimile of a document; (verb) to transmit by telefax. |
| telegram | a message sent by telegraph; (verb) to transmit by telegram. |
| telegrammic | of or like a telegram. |
| telegraphy | the use or operation of a telegraph apparatus or system for communication. |
| teleseme | a signalling apparatus with an indicator. |
| teletex | a more advanced form of telex. |
| teletype | (Tradename) a type of teleprinter; (verb) to send a typed message by telegraph. |
| telex | (Tradename) an international system of telegraphy in which printed messages are transmitted and received by teleprinters using the public telecommunication lines; (verb) to send a message by telex. |
| vocoder | an electronic device used in transmitting speech signals. |
| wilco | in signalling, an indication of compliance ('I will comply'). |