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American Dictionary of the English Language

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Diameter


DIAMETER, noun [Gr., measure through.]

1. A right line passing through the center of a circle or other curvilinear figure, terminated by the circumference, and dividing the figure into two equal parts.

2. A right line passing through the center of a piece of timber, a rock or other object, from one side to the other; as the diameter of a tree, or of a stone.