pattypan noun2 •A pan used for baking patties.I heard the most uncommon and unaccountable noise that can be imagined. It was, in fact, occasioned by the clattering of tin pattypans and a Dutch oven against the sides of the panniers. — 1780 •(US, Canada) A small variety of squash with a scalloped rim and creamy white flesh; a pattypan squash. formspattypans