semidiameter
IPA: sɛmidaɪˈæmʌtɝ
noun
- (astronomy) The apparent radius of a star etc, when viewed from Earth.
- (archaic) A radius: half of a diameter.
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Examples of "semidiameter" in Sentences
- Sun's semidiameter as observed from Earth's surface is around 16.3'.
- Additionally the observed altitudes are cleared of dip and semidiameter.