Ma'anar ƙamus na kalmar "carthorse" babban doki ne mai ƙarfi wanda ake amfani da shi wajen zana kaya masu nauyi, musamman a cikin keken doki ko abin hawa. Ana kuma san shi da daftarin doki ko dokin aiki. Ana amfani da kalmar “carthorse” don yin nuni ga doki da aka yi kiwo musamman kuma aka horar da shi don wannan dalili, maimakon dokin doki ko tseren tsere.
