Dutch oven was the term my grandmother used--pre WW11-I She also called it a "kittle." Not unique. I have her big one. It is like a very heavy, hammerd metal, with domed lid and bail. works a treat for stews, soups. Not pretty, but so often pretty is a misleading attribute.
A spider is a fry pan. I have always known them to be cast iron fry pans, but in some areas of the U.S, spider is used for all fry pans.
My cast iorn fry are totally stick free. 'Course at end of use I fill with water, boil hard for a moment or two, then rinse and wipe with paper towels. Back on the still warm burner to dry with no rust. LOve those babies! It is NOT my imagination--any potato dish is so much better in cast iron. Hash browns, fried, potato pancakes, the list goes on. Well, now I have worked myself into a potato pancake must have it mood. Oh, all the grating! As grandma said, "the little drop of knuckle blood makes it special." With blender, processer (or? er?), they do not have the best flavor. Must be that knuckle blood.