vocabularies

How a popcorn popper pops the kernels: by hot air (a fan blows electrically-heated air through dry kernels, oil-free) or by oil and stirring (a heated plate warms a little oil while a motorised rod stirs the kernels). The two real powered mechanisms a domestic popper ships with — the definitional buyer choice. Passive microwave popping bowls are not powered appliances and are out of scope (L8). A growing vocabulary (L13).

Answers the question: popping method.