Friesian /ˈfɹiːʒən/noun 2adjective 1forms 3 noun2 •A breed of black and white dairy cattle; any individual cow of that breed.[...] the more expensive and creamier Jersey or South Devon milk, for example, is kept apart from Friesian milk, with its low butter content. — 1959 •A black breed of horse. adjective1 •Of or relating to the work of Swedish mycologist and botanist Elias Magnus Fries, who described and assigned botanical names to hundreds of fungus and lichen species. formsFriesians · more Friesian · most Friesian