rainbow-like Definition

rainbow
noun

1. An arch of all the colours of the spectrum, ie red, orange, yellow, green, blue, indigo and violet, that can be seen in the sky when falling raindrops reflect and refract sunlight.
2. A collection or array of bright colours.

adj

1. Relating to, or coloured like, the rainbow.

Derivative: rainbowy
adj

Idiom: chase rainbows

To pursue an impossible aim or hope.

Etymology: Anglo-Saxon regnboga.