半径
radius
Traditional: 半徑
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📖 Additional Information
English Phonetic:
'reidiәs
Detailed Definition:
n. the length of a line segment between the center and circumference of a circle or sphere\nn. a straight line from the center to the perimeter of a circle (or from the center to the surface of a sphere)\nn. a circular region whose area is indicated by the length of its radius\nn. the outer and slightly shorter of the two bones of the human forearm