A tuned electromagnetic device that can send and receive broadcast signals at particular frequencies, is called antenna. In wireless networking devices, an antenna is an important part of the devices sending and receiving circuitry.

Webster Dictionary Meaning

1. Antenna
- 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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