Brain wave and Off-the-wall

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

Off-the-wall and brain wave are semantically related. In some cases you can use "Off-the-wall" instead an adjective phrase "Brain wave".

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

Brain wave and off-the-wall are semantically related. Sometimes you can use "Brain wave" instead an adjective phrase "Off-the-wall".