isogradient

[ ahy-suh-grey-dee-uh nt ]
/ ˌaɪ səˈgreɪ di ənt /

noun Meteorology.

a line on a weather map or chart connecting points having the same horizontal gradient of a meteorological quantity, as temperature, pressure, or the like.

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“Compliment” and “complement” had a shared meaning a long time ago, but today they are no longer interchangeable.

Origin of isogradient

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020