Webster’s Revised Unabridged Dictionary · 1913
Arcual
Arc′u·al (ärk′ū·al), a. Of or pertaining to an arc.
Arcual measure of an angle (Math.), that in which the unit angle has its measuring arc equal to the radius of the circle.
Webster’s Revised Unabridged Dictionary · 1913
Arc′u·al (ärk′ū·al), a. Of or pertaining to an arc.
Arcual measure of an angle (Math.), that in which the unit angle has its measuring arc equal to the radius of the circle.