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aclinic line

American  
[ey-klin-ik] / eɪˈklɪn ɪk /

noun

  1. an imaginary line on the surface of the earth, close and approximately parallel to the equator, connecting all those points over which a magnetic needle shows no inclination from the horizontal.


aclinic line British  
/ əˈklɪnɪk /

noun

  1. another name for magnetic equator

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of aclinic line

1840–50; < Greek aklin ( ḗs ) not bending ( a- a- 6 + klin-, variant stem of klī́nein to bend) + -ic