Noun: workhorse 'wurk,hors
- A horse used for ploughing and hauling and other heavy labour
"The sturdy workhorse pulled the heavy plough through the field"
- Machine that performs dependably under heavy use
"the IBM main frame computers have been the workhorse of the business world"
Derived forms: workhorses
Type of: Equus caballus, horse, hoss [US, informal], machine
Encyclopedia: Workhorse