A Hessian's an inhabitant of the German state of Hesse. Hessian may also mean: Hessian (soldiers), eighteenth-century German regiments in service with the British Empire Hessian (boot), a style of boot Hessian (cloth), coarse woven material Hessian (web service protocol) Hessian dialects, West Central German group of dialects Hessian matrix, in mathematics, a matrix of second partial derivatives Hessian fly or barley midge, a species of fly… (More on Hessian)