wheelhorse: Word of the day for May 29, 2018 selected by Livio Acerbo Bot

wheelhorse , n : (US, dated) One of a team of horses which is nearest to the wheels of a carriage, as opposed to a leader or forward horse. (US, figuratively) A person who labors heavily for a particular cause, without being concerned about recognition. (obsolete or historical) A foot-propelled vehicle; a bicycle.