Antenna definition

ăn-tĕnə
Either of a pair of movable, jointed sense organs on the head of most arthropods, as insects, crabs, or lobsters; feeler.
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A metallic device for sending or receiving electromagnetic waves, such as radio waves. Some antennas can send waves in or receive waves from all directions; others are designed to work only in a range of directions.
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The definition of an antenna is a wire that receives and conducts electromagnetic waves, typically to transmit information.

An example of an antenna is the long thin metal piece extending upward from a car intended to receive radio signals.

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In zoology, an antenna is defined as the long appendage, usually coming in pairs, on the head of an arthropod that is used to sense the environment.

An example of an animal that has an antenna is a fly.

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A metallic apparatus for sending or receiving electromagnetic waves.
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(zoology) One of the paired, flexible, segmented sensory appendages on the head of an insect, myriapod, or crustacean functioning primarily as an organ of touch.
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Something likened to this sensory appendage, as in function or form.

Sensitive public relations antennae.

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An arrangement of wires, metal rods, etc. used in sending and receiving electromagnetic waves; aerial.
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A single rod or wire acting as such an antenna for a small television or radio receiver, cell phone, etc.
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A structure in a photosynthetic organism containing pigment molecules that absorb light energy and transfer it to a reaction center composed of proteins and pigments, where the light energy is converted into chemical energy.
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(zoology) One of the paired, flexible, segmented sensory appendages on the head of an insect, myriapod, or crustacean functioning primarily as an organ of touch.
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Something likened to this sensory appendage, as in function or form.

Sensitive public relations antennae.

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A device comprising an arrangement of wires, metal rods, and so on for radiating and receiving radio signals.A transmitting antenna converts electrical current to electromagnetic radio waves projected into free space or a waveguide.A receiving antenna converts electromagnetic radio waves into electric current.An antenna commonly performs both transmit and receive functions.The transmitters and receivers used in free space optics (FSO) also can be characterized as antennas. See also free space, FSO, and waveguide.
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A feeler organ on the head of an insect, crab, or other animal.
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An apparatus to receive or transmit radio waves and convert respectively to or from an electrical signal.
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One of a pair of long, slender, segmented appendages on the heads of insects, centipedes, millipedes, and crustaceans. Most antennae are organs of touch, but some are sensitive to odors and other stimuli.
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Other Word Forms

Noun

Singular:
antenna
Plural:
antennae, antenn, antennas

Origin of antenna

  • Medieval Latin from Latin sail yard translation of Greek keraia insect feeler, yardarm

    From American Heritage Dictionary of the English Language, 5th Edition

  • From Latin antenna, nautical term for yard and common term for pole, of uncertain origin, but possibly from Proto-Indo-European *temp- (“to stretch, extend”).

    From Wiktionary