noun

wheelhorse

wheel·horse

wheelhorse · wheelhorses

One of a team of horses which is nearest to the wheels of a carriage, as opposed to a…One of a team of horses which is nearest to the wheels of a carriage, as opposed to a leader or forward horse.

UK/ˈʍiːlhɔː(ɹ)s/US/ˈʍiːlhɔɹs/

Meaning

3 senses

(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.
(historical, obsolete)A foot-propelled vehicle; a bicycle.