Brain wave and Wacky

Brain wave noun - (neurophysiology) rapid fluctuations of voltage between parts of the cerebral cortex that are detectable with an electroencephalograph.

Wacky and brain wave are semantically related. In some cases you can use "Wacky" instead an adjective phrase "Brain wave".

Wacky adjective - Different from the ordinary in a way that causes curiosity or suspicion.

Brain wave and wacky are semantically related. Sometimes you can use "Brain wave" instead an adjective "Wacky".