Agonic Line

(a-gon'ik.) [Gr. a, priv., and go nia, angle.] (Physical Geog.) An irregularly curved imaginary line,connecting points on the earth where the magnetic coincides with the geographical meridian. Such a line cuts the E. of S. America, and pa ing E. of the W.Indies, enters N. America near Philadelphia, and traverses Hudson's Bay. [s. 13]