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Definition of Semidiameter
1. Noun. The apparent radius of a celestial body when viewed as a disc from the earth.
Definition of Semidiameter
1. n. 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.
Definition of Semidiameter
1. [n -S]
Medical Definition of Semidiameter
1.