hayrack
noun
hay·rack ˈhā-ˌrak 
1
: a feeding rack that holds hay for livestock
2
: a frame mounted on the running gear of a wagon and used especially in hauling hay or straw
also : a wagon equipped with a hayrack
Example Sentences
Recent Examples on the Web Minick, who was driving a sedan, crashed into the back of the hayrack, causing all 12 passengers in the wagon to be ejected, according to officials. 
Megan Jones, Chicago Tribune, 24 May 2022 Tours of the farm and its many adorable animals continue until 7 p.m. Traditional harvest-time hayrack rides will take guests on a half-mile route around the edges of the 60-acre working farm. Ginger Brashinger, Daily Southtown, 1 Sep. 2017
Megan Jones, Chicago Tribune, 24 May 2022 Tours of the farm and its many adorable animals continue until 7 p.m. Traditional harvest-time hayrack rides will take guests on a half-mile route around the edges of the 60-acre working farm. Ginger Brashinger, Daily Southtown, 1 Sep. 2017 Word History
First Known Use
1753, in the meaning defined at sense 1