antenna

Definitions

  • Antennae
    Antennae
  • WordNet 3.6
    • n antenna one of a pair of mobile appendages on the head of e.g. insects and crustaceans; typically sensitive to touch and taste
    • n antenna an electrical device that sends or receives radio or television signals
    • n antenna sensitivity similar to that of a receptor organ "he had a special antenna for public relations"
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Webster's Revised Unabridged Dictionary
  • Interesting fact: The leaf bug of ceylon (phyllum sicci folium) has legs and antennae the color and shape of leaves, has indentations on its body like the vein marks on a leaf, and hangs from branches, swaying in the breeze exactly like a leaf.
    • Antenna (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.
    • Antenna (Zoöl) 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.
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Century Dictionary and Cyclopedia
  • Interesting fact: Most cell phone antennas have no purpose other than to make people believe that flipping up a 2 inch antenna just gave them better reception. They are not connected to any circuitry.
    • n antenna One of the lateral articulated appendages occurring in pairs on that segment of the head of an arthropod animal, as an insect, which immediately precedes the mouth or mandibular segment; a feeler or ‘horn.’ They vary greatly in size, shape, and function. The appendages of the head, proceeding forward from the mouth-parts, are: antennæ, antennulæ, ophthalmites or eye-stalks. plural In Crustacea: Properly, the posterior one of the two pairs of feelers or horns borne upon the head of most crustaceans, as crabs and lobsters, as distinguished from the anterior pair, or antennulæ. From their relative size they are known as the long feelers, in distinction from the antennulæ, or short feelers. When fully developed, the antennæ consist of a number of parts, which, beginning with the base, are named the basicerite, the scaphocerite, the ischiocerite, the merocerite, the carpocerite, and the (terminal) procerite. The last may consist of a long filament with many articulations, sometimes exceeding the whole length of the animal's body. See cuts under Cypris, Cythereidæ, and Limnetis. Loosely, either one of the two pairs of horns or feelers, that is, either the antennæ proper or the antennulæ. In Arachnida, or spiders, scorpions, etc., a chelicere; one of the pair of chelate or subchelate appendages of the head, situated between and morphologically in front of the large hooked or pincer-like appendages known as pedipalps. They are adapted for seizing and tearing, and sometimes convey a poisonduct. They are homologous with the feelers of crustaceans and insects, and are supposed, in some cases at least, to represent antennulæ as well as antennæ proper. See cuts under chelicera and scorpion. In Insecta and Myriapoda, a horn or feeler; one of the pair of jointed flexible sensitive appendages of the head, morphologically situated between the mouth-parts and the eyes, though generally appearing in the adult between or before the eyes. These characteristic organs are usually filamentous with many articulations, and are very diverse in form; some of the terms used in describing their shapes are filiform, denticulate, bipinnate, clavate, geniculate. In Coleoptera, divisions have been founded upon the shapes of the antennæ, as lamellicorn, clavicorn, longicorn, etc. These organs are almost universally present in some form or other, though occasionally rudimentary and inconspicuous, in which cases the insects are termed acerous, as distinguished from dicerous. The parts of a well-formed antenna usually recognized are the pedicel, scape, and flagellum or claveola, the last usually composing most of the length of the organ. See Hymenoptera, Insecta.
    • n antenna An analogous organ on the heads of other animals, as a feeler or tentacle, like the eye-stalk of a snail.
    • n antenna plural Projecting horns of iron or bronze found on some ancient helmets, perhaps serving only as ornaments, or as badges, or in some cases to stop a blow from glancing downward and striking the shoulder.
    • n antenna In Rotifera, a spur-like process bearing a tuft of setæ and projecting from the mid-dorsal line close to the trochal disk. Same as calcar, 4.
    • n antenna In electricity, the vertical conductor used in wireless telegraphy to send out electric waves (sender) or receive them (receiver).
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Idioms

Good antennae - Someone with good antennae is good at detecting things.
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Etymology

Webster's Revised Unabridged Dictionary
L. antenna, sail-yard; NL., a feeler, horn of an insect

Usage

In literature:

The rails themselves act as antenna for the broadcaster, and the rat's tail is the pickup antenna.
"Anything You Can Do" by Gordon Randall Garrett
A bright red metal pole, topped by a small housing and antenna came into view on the side of the road.
"The Thirst Quenchers" by Rick Raphael
There was movement next to the antenna prow on the ship's nose.
"Before Egypt" by E. K. Jarvis
When I poke him up, he blinks with his antennae and slowly makes off.
"The Crow's Nest" by Clarence Day, Jr.
And the finest of all antennae are those of vanity.
"Pierre and Luce" by Romain Rolland
The smaller pair of antennae has disappeared.
"A Monograph on the Sub-class Cirripedia (Volume 1 of 2)" by Charles Darwin
That was the antenna.
"The Blue Ghost Mystery" by Harold Leland Goodwin
Hassan drove into a parking lot before the main project building in the shadow of the antenna and Dr. Hakim Farid came out to greet the boys.
"The Egyptian Cat Mystery" by Harold Leland Goodwin
His antennae lifted to catch the whispers that from time to time were exchanged between even the best-behaved of the students.
"The Vilbar Party" by Evelyn E. Smith
The mysterious prophecy of the Turk was a cursed falsehood, a mere result of blind groping with unskilful antennae.
"The Serapion Brethren," by Ernst Theodor Wilhelm Hoffmann
Up above, the antenna came slowly down.
"Second Variety" by Philip Kindred Dick
Clinging there, it swiftly dug two tiny, needle-like antennae into the base of his neck.
"The World with a Thousand Moons" by Edmond Hamilton
The huge disk with the feeler-ray antennae sank down close to his chest, heavy as the keystone upon a tomb.
"The Brain" by Alexander Blade
Jenny's gay deep eyes were obscured by tricolor flags or the spout of a teapot or the disproportionate antennae of a butterfly.
"Carnival" by Compton Mackenzie
Always, like the wireless, he was pushing his antennae into uncharted space, never resting content with the achievements of yesterday.
"Thirty" by Howard Vincent O'Brien
You women always seem to me to have special antennae for finding out dislikes.
"The Great Miss Driver" by Anthony Hope
The tergal elements of the somites bearing the antennae, mandibles and maxillae appear to be represented by the head-shield or cephalite.
"Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 6" by Various
He fiddled with the dials for a long time, twisting the antenna, ranging the wavelengths, but there was static everywhere.
"The Secret of the Ninth Planet" by Donald Allen Wollheim
May not, then, this undiscovered sense, whatever may be its nature, reside in the antennae?
"British Butterfiles" by W. S. Coleman
The male has normally thirteen joints in its antennae, and the female only twelve.
"Wild Bees, Wasps and Ants" by Edward Saunders
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In poetry:

With salt sea-scents along its shores
The heavy hay-boats crawl,
The long antennae of their oars
In lazy rise and fall.
"The Countess" by John Greenleaf Whittier
Yea, he who draws, in shrinking haste,
From sin that passeth helpless by;
The weak antennae of whose taste
From touch of alien grossness fly—
Shall, banished to the outer waste,
Never in Nature's bosom lie.
"He Needed Not" by George MacDonald
I was sitting with my microscope, upon my parlor rug,
With a very heavy quarto and a very lively bug;
The true bug had been organized with only two antennae,
But the humbug in the copperplate would have them twice as many.
"Nux Postcoenatica" by Oliver Wendell Holmes

In news:

WAGM's Old Antenna Brought Down.
Wagm has fixed its damaged antenna that was hit by lightening a few weeks ago.
On Sunday the new antenna was fired up on the tower in mars hill.
Tower climber is next to the Public Radio Tulsa main and emergency antennas .
High winds over the past few weeks might have caused the antenna 's multiple rigid copper straps to break, which ground the antenna to the tower, resulting in the antenna being unable to accept full transmission power.
Space for antennas is often limited within the confines of a device housing.
Antenna operation can also be blocked by intervening metal structures.
This can make it difficult to implement an antenna in an electronic device that contain...
HARMAN's AKG FLOORPAD Near-Field Antenna Increases Signal Quality For Close-Range Applications.
The Arcata Ball Park light standard on the right was one of the locations proposed for co-locating the cell phone antenna KLH Eye.
Kymeta was founded to exploit new metamaterials to create beam-steering antennas for mobile broadband applications.
Gates puts cash into broadband antenna start-up.
Most major WLAN vendors feature a slim-profile "flagship" access point with "captive antennas " that aesthetically blend well with most environments.
I find antenna specifications confusing.
That's part of the problem with indoor antennas .
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In science:

The dirty maps and corresponding antenna patterns were exported into the GIPSY package which was used for further data reduction and analysis as described below.
Star Formation and Tidal Encounters with the Low Surface Brightness Galaxy UGC 12695 and Companions
Such antennas permit direct observation of the frequency spectrum of thermal noise.
Influence of Random Irregularities on Quasi-Thermal Noise Spectrum of Plasma
Bk is Boltzmann constant, Z is antenna impedance and Re denotes the real part.
Influence of Random Irregularities on Quasi-Thermal Noise Spectrum of Plasma
Calculation of antenna impedance in general case is rather complex problem.
Influence of Random Irregularities on Quasi-Thermal Noise Spectrum of Plasma
The geometry of wire dipole antenna is shown in Fig. 1.
Influence of Random Irregularities on Quasi-Thermal Noise Spectrum of Plasma
Andronov A.A. Antenna impedance and noise in a pace plasma .
Influence of Random Irregularities on Quasi-Thermal Noise Spectrum of Plasma
Noise spectrum received by an antenna in a plasma.
Influence of Random Irregularities on Quasi-Thermal Noise Spectrum of Plasma
Tool kit for antennae and thermal noise near the plasma frequency. J.
Influence of Random Irregularities on Quasi-Thermal Noise Spectrum of Plasma
In this section we move further out to where it becomes difficult to resolve the individual stars, except in extraordinarily extended clusters such as knot S in NGC 4038/4039 (the “Antennae Galaxies”, Whitmore et al. 1999).
The Formation of Star Clusters
Blowup of two of the brightest clusters in the Antennae (left) and the central regions of the two galaxies (right) from Whitmore et al. (1999).
The Formation of Star Clusters
He suggested that the apparently larger values in the Antennae were due to poorer resolution and crowding.
The Formation of Star Clusters
Perhaps the best case is for the Antennae galaxies as measured by Whitmore et al. (1999), since this is the nearest of the prototypical mergers and the observations were made with subpixel dithering which improves the resolution still further.
The Formation of Star Clusters
For example, Whitmore et al. (1999) use UBVI photometry and reddening-free Q parameters to determine ages for the clusters in the Antennae (Figure 6).
The Formation of Star Clusters
Whitmore et al. (1999) obtained GHRS spectra of two clusters in the Antennae with age estimates of 3 ± 1 Myr and 7 ± 1 Myr, in good agreement with the estimates based on the UBVI colors and the Hα morphology.
The Formation of Star Clusters
Color-color diagram and reddening-free Q parameter diagram for clusters in the Antennae.
The Formation of Star Clusters
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