Is Rainband a Word?

a dark band in the solar spectrum caused by water vapor in the atmosphere.

What does Rainband mean?

: a dark band in the yellow portion of the solar spectrum near the sodium lines caused by watery vapor in the atmosphere and therefore sometimes used in weather predictions.

What do rainbands look like?

Rainbands in a tropical cyclone are curved and may even spiral around the center of the cyclone. Tropical cyclone rainbands include rain showers and thunderstorms. When this includes an eyewall and the eye, they make a hurricane or tropical storm.