| 释义 |
cir·cum·zenithal arc
\| ̷ ̷ ̷ ̷ at circum-+...-\ noun
Etymology: International Scientific Vocabulary circum- + zenithal; originally formed as French circumzénithal
: a bright rainbow-colored circular halo arc about the zenith as center convex to the sun and about 46 degrees above it |