semidiameter

名词 n.
中文释义

英文释义

名词 n.
  1. The apparent radius of a star etc, when viewed from Earth.
  2. A radius: half of a diameter. archaic
    — [B]etweene the ſphere of Saturne and the Firmament, there is ſuch an incredible and vaſt ſpace or diſtance (7000000. ſemidiameters of the earth, as Tycho [Brahe] calculates) void of ſtarres: [...]

词形变化

semidiameters plural

词汇关系

衍生词
semidiameter correction

词源

From Middle English semidiametre, semydiametre, from Medieval Latin sēmidiameter, equivalent to semi- + diameter.
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