主しゅ虹にじMeanings1nounprimary rainbowTechnical term for the brighter, inner rainbow with red on the outer edge and violet on the inner edge. Used in meteorology and optics.主しゅ虹にじの外そと側がわに副ふく虹にじが見みえることがある。A secondary rainbow can sometimes be seen outside the primary rainbow.
