ClipArt ETC
"The inner or primary bow is much brighter than the other; the outer or secondary bow has the order of colors revered, as indicated." -Avery 1895

Secondary Rainbow

"The inner or primary bow is much brighter than the other; the outer or secondary bow has the order…

"In meteorology, a subsidiary cyclonic circulation, generally on the border of a primary cyclone accompanied by rain, thunder-storms, and squalls: indicated on a weather-map by the bulging of a sea-level isobar toward the region of higher pressure." -Whitney, 1911

Secondary

"In meteorology, a subsidiary cyclonic circulation, generally on the border of a primary cyclone accompanied…

"Two secondary spores joined"—Finley, 1917

Joined spores

"Two secondary spores joined"—Finley, 1917