cloudbow


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cloud·bow

 (kloud′bō′)
n.
A faint white or yellowish arc-shaped light, similar to a rainbow, that sometimes appears in clouds opposite the sun.

References in periodicals archive ?
He presents his collection of color photographs and explanations regarding sky colors, coronas and iridescence, rainbows and cloudbows, glories, shadows, water colors and glitter, halos and pillars, noctilucent clouds and aurora, and colors from polarization.