rational horizon

American  

[rash-uhn-uhl-huh-rahy-zuhn] / ˈræʃ ən əl həˈraɪ zən /

noun

1. Astronomy. Also called celestial horizon. the great circle of the celestial sphere whose plane passes through the center of the earth and is parallel to the sensible horizon of a given position, or the plane of such a circle.

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rational horizon Scientific  

/ răsh′ə-nəl /

1. See celestial horizon

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Example Sentences

Our rational horizon is that circle in the heavens which bounds our vision, when on the ocean, an extended plane, or any elevated situation.

From Conversations on Natural Philosophy, in which the Elements of that Science are Familiarly Explained by Jones, Thomas P.

For what is the extent of our merely rational horizon at any time?

From Warlock o' Glenwarlock by MacDonald, George

Reid. ÷ horizon, the circle which in a level plain bounds our view, and is formed by the ~ meeting of the earth and heavens, as distinguished from the rational horizon.

From Webster's Unabridged Dictionary by Webster, Noah