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3 definitions found
 for antenna
From The Collaborative International Dictionary of English v.0.48 :

  Antenna \An*ten"na\, n.; pl. Antenn[ae]. [L. antenna
     sail-yard; NL., a feeler, horn of an insect.]
     1. (Zool.) A movable, articulated organ of sensation,
        attached to the heads of insects and Crustacea. There are
        two in the former, and usually four in the latter. They
        are used as organs of touch, and in some species of
        Crustacea the cavity of the ear is situated near the basal
        joint. In insects, they are popularly called horns, and
        also feelers. The term in also applied to similar organs
        on the heads of other arthropods and of annelids.
        [1913 Webster]
     2. (Electronics) A metallic device, variously shaped,
        designed for the purpose of either transmitting or
        receiving radio waves, as for radio or television
        broadcasting, or for transmitting communication signals.
        Some types are: whip antenna, antenna tower, horn
        antenna, dish antenna, directional antenna and
        rabbit ears. See transmitter, receiver.

From WordNet (r) 3.0 (2006) :

      n 1: an electrical device that sends or receives radio or
           television signals [syn: antenna, aerial, transmitting
      2: sensitivity similar to that of a receptor organ; "he had a
         special antenna for public relations" [syn: antenna,
      3: one of a pair of mobile appendages on the head of e.g.
         insects and crustaceans; typically sensitive to touch and
         taste [syn: antenna, feeler]

From Moby Thesaurus II by Grady Ward, 1.0 :

  29 Moby Thesaurus words for "antenna":
     aerials, barb, barbel, barbule, bedspring type, cat whisker,
     directional antenna, dish, doublet, feed-and-reflector unit,
     feeler, mast, mattress type, palp, palpus, reflector,
     rhombic antenna, scanner, strike radar scanner, tactile cell,
     tactile corpuscle, tactile hair, tactile organ, tactile process,
     tactor, tower, transmitting antenna, vibrissa, wave antenna

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