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    antenna

    1. (phys.) A device for collecting or transmitting radio signals, the design of which depends on the wavelength and amplitude of the signals.

         • RADIO ASTRONOMY AND COMMUNICATIONS



    2. (bio.) Usually one of a pair of many-jointed, whip-like structures present on the head of many arthropods, particularly insects (first appendage on head) and crustaceans(second appendage). Antennae have a sensory function, though in some crustaceans they are used for attachment or swimming.

         • ZOOLOGY


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