"antenna" in the noun sense

1. antenna, aerial, transmitting aerial

an electrical device that sends or receives radio or television signals

2. antenna, feeler

sensitivity similar to that of a receptor organ

"he had a special antenna for public relations"

3. antenna, feeler

one of a pair of mobile appendages on the head of e.g. insects and crustaceans typically sensitive to touch and taste

Source: WordNet® (An amazing lexical database of English)

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