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diurnal arc

American  

noun

Astronomy.
  1. the portion of the diurnal circle that is above the horizon at a given point.


Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

The diurnal arc is described during the daytime, the nocturnal arc during the night.

From Webster's Unabridged Dictionary by Webster, Noah

On this day, the sun which had risen at twenty minutes to six, set at forty minutes past five, having traced its diurnal arc for eleven hours above the horizon.

From Michael Strogoff Or, The Courier of the Czar by Verne, Jules