Wave-Form is a 9 letter English word. It's valid Scrabble word worth 10 points. It's valid Words with friends word worth 11 points.
You can make 226 anagrams from letters in wave-form (-aefmorvw).
First recorded in 1840-50
It is then possible to see whether the "wave-form" of the current is what it ought to be.
Then he defines the wave-form, voltage, and amperage entering the circuit and defines whatever is coming out.