| 单词 | semidiameter |
| 释义 | semidiameter (once / 142402 pages) n WORD FAMILY semidiameter: semidiameters+/diameter: diameters, diametral, diametric, diametrical, semidiameter/diametral: diametrally/diametric: diametrically USAGE EXAMPLESNaval Observatory routinely uses 34 minutes of arc for the angle of refraction and 16 minutes of arc for the semidiameter of the sun's disc. Scientific American(Mar 19, 2012) For if the Arch of a Quadrant be equal to the Aggregate of the Semidiameter and of the Tangent of 30. Oldenburg, Henry, Philosophical Transactions of the R...(2010) For a right line either from the center unto the touch-point; or from the touch point unto the center is radius or semidiameter. Bedwell, William, The Way To Geometry(2010) n the apparent radius of a celestial body when viewed as a disc from the earth Hyper r, radius the length of a line segment between the center and circumference of a circle or sphere |
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