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isopor

American

[ahy-suh-pawr] / ˈaɪ səˌpɔr /

noun

an imaginary line on the earth's surface connecting points of equal annual change in the declination, inclination, or other components of the earth's magnetic field.

Other Word Forms

isoporic

adjective

Etymology

Origin of isopor

1930–35; iso- + -por < Greek póros path, pore ²

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.