semidiameter
semidiameter · semidiameters
The apparent radius of a star etc, when viewed from EarthThe apparent radius of a star etc, when viewed from Earth.
Meaning
2 sensesThe apparent radius of a star etc, when viewed from Earth.
the apparent radius of a celestial body when viewed as a disc from the earth
(archaic)A radius: half of a diameter.
Origin
From Middle English semidiametre, semydiametre, from Medieval Latin sēmidiameter, equivaleFrom Middle English semidiametre, semydiametre, from Medieval Latin sēmidiameter, equivalent to semi- + diameter.
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Forms
plural: semidiameters| Singular | semidiameter |
|---|---|
| Plural | semidiameters |
regular