feel ‧ er /ˈfiːlə $ -ər/ BrE AmE noun [countable usually plural]
1 . one of the two long things on an insect’s head that it uses to feel or touch things. Some sea animals also have feelers.
2 . put out feelers to carefully try to discover what people think about something that you want to do:
They seem interested in a peace settlement and have begun putting out feelers.