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great-circle track

American  
[greyt-sur-kuhl trak] / ˈgreɪtˈsɜr kəl ˌtræk /

noun

  1. the route of a ship following the arc of a great circle, appearing as a curved line on a Mercator chart and as a straight line on a gnomonic chart.

Etymology

Origin of great-circle track

First recorded in 1955–60

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.