- n. the outermost level of the land or sea
“The commission finally decided that the basis of its system should be the earth's polar quadrant -- that is, the precise distance on the earth's surface from the equator to the pole.”
“The term is used in two widely-different senses: (1) for the material of which the earth's surface is composed; (2) as the name of the planet on which man dwells.”
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