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Antenna   Listen
noun
Antenna  n.  (pl. antennae)  
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.
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.





Collaborative International Dictionary of English 0.48


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"Antenna" Quotes from Famous Books



... the Catasetum, is widely different, though serving the same end; and is equally curious. Bees visit these flowers, like those of the Coryanthes, in order to gnaw the labellum; in doing this they inevitably touch a long, tapering, sensitive projection, or, as I have called it, the antenna. This antenna, when touched, transmits a sensation or vibration to a certain membrane which is instantly ruptured; this sets free a spring by which the pollen-mass is shot forth, like an arrow, in the right direction, and adheres by its viscid extremity to the ...
— On the Origin of Species - 6th Edition • Charles Darwin
... attached to him comes in contact with the stigma of that second flower and fertilises it. In the other example (catasetum), when a bee gnaws a certain part of the flower, he inevitably touches a long delicate projection which Mr. Darwin calls the 'antenna.' 'This antenna transmits a vibration to a membrane which is instantly ruptured; this sets free a spring by which the pollen mass is shot forth like an arrow in the right direction, and adheres by ...
— Life and Habit • Samuel Butler
... (from Lubbock). Labelled are: a. Part of right anterior antenna of male, forming a prehensile organ. b. Posterior pair of thoracic legs of ...
— The Descent of Man and Selection in Relation to Sex • Charles Darwin
... of brood comb that had been put into the hive to prevent the discouragement of the bees was then removed. I put aside the queens produced in the royal cells; and having painted the thorax of the six bees red, and amputated the right antenna, I transferred the whole six into the hive, where they were ...
— New observations on the natural history of bees • Francis Huber
... "Every radar base from Albuquerque to the Mexican border has an antenna focused on the air above this ranch. The minute you get above those mountains, they'll have a fix on you, and a minute after that, they'll have ...
— By Proxy • Gordon Randall Garrett
... came clanking around the curve of the small metal world. The antenna of his walkie-talkie glittered above his head. He seemed to swagger against the ...
— Space Tug • Murray Leinster
... with those of the same species if belonging to different communities. I have over and over again introduced Ants from one of my nests into another nest of the same species, and they were invariably attacked, seized by a leg or an antenna, and ...
— The Beauties of Nature - and the Wonders of the World We Live In • Sir John Lubbock
... facility with a microwave radio transmitting and receiving antenna and required receiving and transmitting equipment for communicating ...
— The 1997 CIA World Factbook • United States. Central Intelligence Agency.
... eyes to the darkening heavens, and he knew now that the threads of this, his greatest adventure, were being drawn to a meeting point; for he detected in the sun's last refracted rays the bronze glint of aerial wires! What lay at the base of the antenna he could guess accurately. He hastened to the base of the nearest aerial mast—a pole reaching like a dark needle into the sky—and found there a low, dark building of varnished pine with a small door of ...
— Peter the Brazen - A Mystery Story of Modern China • George F. Worts


Words linked to "Antenna" :   directional antenna, sensitivity, antennal, tv-antenna, transmitting aerial, tentacle, dipole antenna, receiving system, transmitter, television antenna, omnidirectional antenna, antennary, radio antenna, feeler, receiver, dipole, aerial, sender, dish antenna, sensitiveness


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