feeler

(n) one of a pair of mobile appendages on the head of e.g. insects and crustaceans; typically sensitive to touch and taste antenna,
(n) a tentative suggestion designed to elicit the reactions of others
- she rejected his advances
advance, overture, approach,
(n) sensitivity similar to that of a receptor organ
- he had a special antenna for public relations
antenna,
(n) slender tactile process on the jaws of a fish barbel,

antenna advance overture approach barbel