adjective, rain-bowr-ier, rain-bowr-iest.
1. brightness of colors in rainbow
2. in clear view of an arc shaped prismatic colors, it can be used to describe the brightness in particular section.
Developed by M on 9/18/2012. It was originally created to describe part of a rainbow (witnessed on the same day) having brighter color compared to the rest.
"Hey, look! That part is really rainbowry!"
The photograph of the rainbow which author had witness and has described above is not available due to absence of mechanical devise at that time.
For further questions, please contact author.