arc
That part of a circle which a heavenly body appears to pass through as it moves above and below the horizon.
Other meanings
A continuous part of the circumference of a circle (circular arc) or of another curve.
A curve, in general.
“Swing it from side to side in a high arc overhead.”
Example sentences
Word history
From Latin "arcus" (a bow, arc, arch).
Where this comes from
This definition is adapted from “arc” on Wiktionary, by its contributors; example sentences are from Tatoeba, credited to their authors above, published under CC BY-SA 4.0. This page is published under the same licence.