boathorse

plural boathorses

1. A horse that tows a boat or barge.

   The boathorse provided the power for most boats until the 1880s, when steam boats became more common.

   2004, Avril Lansdell, Canal Arts and Crafts, page 35

   1 more example

   They have the unfortunate side effect of preventing access to legitimate users such as boathorses and wheelchair users and those with baby buggies.

   2007, Great Britain: Parliament: House of Commons: Environment, Food and Rural Affairs Committee, British Waterways: seventh report of session 2006-07 (page 287)