(aeronautics) A tube attached to an aircraft which can be fitted into the drogue from a tanker aircraft to allow for aerial refuelling. [from 20th c.]
(sciences) A small device, especially an electrode, used to explore, investigate or measure something by penetrating or being placed in it. [from 20th c.]
(astronautics) A small, usually unmanned, spacecraft used to acquire information or measurements about its surroundings. [from 20th c.]
(Go) a move with multiple answers seeking to make the opponent choose and commit to a strategy
(biochemistry) Any group of atoms or molecules radioactively labeled in order to study a given molecule or other structure
Verb
(transitive, intransitive) To explore, investigate, or question