, or arch
The segment of a circle or any curved line, by which all angles are measured.
·noun An <<Arch>>. II. Arc ·noun A portion of a curved line; as, the arc of a circle or of an <<Ell...
Webster's Dictionary of the English Language
·add. ·- The light of an arc lamp. ...
See diurnal arc. ...
The Sailor's Word-Book
See nocturnal arc. ...
That part of a circle, parallel to the equator, which is described by a celestial body from its risi...
That part of a circle, parallel to the equator, which is described by a celestial object, between it...
The arc which a planet appears to describe when its motion is direct or progressive in the order of ...
The sun's depth below the horizon when the planets and stars begin to appear. ...
Half the arc described by a heavenly body between its rising and setting. ...