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centerline

[sen-ter-lahyn] /ˈsɛn tərˌlaɪn/
noun
1.
any line that bisects a plane figure:
the centerline of a building plan.
2.
a line along the center of a road or highway dividing it into separate sections for traffic moving in opposite directions.
3.
Radio. the perpendicular bisector of the line connecting two radio transmitters.
Also, center line.
Origin
1800-1810
1800-10; center + line1
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for centerline
  • The localizer provides runway centerline guidance to aircraft.

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