Period vs. Period-Style

As a general term, something which is period is something directly attested by primary sources, e.g. a recipe from a period source or an article of clothing which has been preserved; something which is period-style is something which attempts to be true to the style in primary sources, e.g. a recipe which, while not found in any period source, uses the same principles of healthy eating, available & likely food-stuffs and so forth, or an article of clothing which is cut similarly to an actual artifact.

Periodoid indicates something which is pseudo-period, e.g. honey-butter or a cloak with a vampire's picture on it. Periodoid things are not mediaeval and never were, but to our eyes (or some of our eyes) they appear to be. They might also be described as medjeeval or medievaloid.