feeler

Noun
  1. One of a pair of mobile appendages on the head of e.g. insects and crustaceans;
    Typically sensitive to touch and taste (synset 102587546)
  2. A tentative suggestion designed to elicit the reactions of others (synset 107179000)
    "she rejected his advances"
  3. Sensitivity similar to that of a receptor organ (synset 104850501)
    "he had a special antenna for public relations"
  4. Slender tactile process on the jaws of a fish (synset 102587916)

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