The definition of an antenna is a wire that receives and conducts electromagnetic waves, typically to transmit information.(noun)
An example of an antenna is the long thin metal piece extending upward from a car intended to receive radio signals.
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.(noun)
An example of an animal that has an antenna is a fly.
See antenna in Webster's New World College Dictionary
Origin: L, earlier antemna, sail yard
See antenna in American Heritage Dictionary 4
noun pl. an·ten·nae (-tĕnˈē)
Origin: Medieval Latin
Origin: , from Latin, sail yard
Origin: , translation of Greek keraia, insect feeler, yardarm.
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