Hypertext Webster Gateway: "antenna"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Antenna \An*ten"na\, n.; pl. {Antenn[ae]}. [L. antenna
sail-yard; NL., a feeler, horn of an insect.] (Zo["o]l.)
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.
From WordNet (r) 1.7 (wn)
antenna
n 1: an electrical device that sends or receives radio or
television signals [syn: {aerial}, {transmitting aerial}]
2: sensitivity similar to that of a receptor organ; "he had a
special antenna for public relations" [syn: {feeler}]
3: one of a pair of mobile appendages on the head of e.g.
insects and crustaceans; typically sensitive to touch and
taste [syn: {feeler}]
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