1. (n.) One who, or that which, feels.

2. (n.) One of the sense organs or certain animals (as insects), which are used in testing objects by touch and in searching for food; an antenna; a palp.

3. (n.) Anything, as a proposal, observation, etc., put forth or thrown out in order to ascertain the views of others; something tentative.

advance antenna approach asking price barb barbel barbule barometer bid bone of contention cat whisker catechism cross-interrogatory cross-question debating point demand foretaste hint inquiry interrogation interrogative interrogatory invitation issue kiteflying leader leading leading question moot point offer offering overture palp palpus pilot balloon point at issue point in question preliminary approach presentation probe problem proffer query question question at issue question mark quodlibet random sample sample sensor sound sounder straw vote submission suggestion tactile cell tactile corpuscle tactile hair tactile organ tactile process tactor tentative approach test tester topic trial balloon vexed question vibrissa weather vane weathercock