English dictionary
semidiameter
/,s/E/m/i/d/aI/'/&/m/I/t/@/r/
Definitions, examples, synonyms and antonyms from WordNet 3.0.
noun
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the apparent radius of a celestial body when viewed as a disc from the earth
Source: WordNet 3.0
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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.
Source: webster1913