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semidiameter |
2 definitions found From Webster's Revised Unabridged Dictionary (1913) [web1913]: Semidiameter \Sem`i*di*am"e*ter\, n. (Math.) Half of a diameter; a right line or the length of a right line drawn from the center of a circle, a sphere, or other curved figure, to its circumference or periphery; a radius. From WordNet r 1.6 [wn]: semidiameter n : the apparent radius of a celestial body when viewed as a disc from the earth
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