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視直径 (しちょっけい) Japanese meaning | Kotomora

視し直ちょっ径けい

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ちょ

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け

い

Meanings

1

noun

apparent diameter

astronomy

Astronomical term for the angular diameter of a celestial body as seen from Earth.

月つきの視し直ちょっ径けいは約やく0.5度どです。
The apparent diameter of the moon is about 0.5 degrees.

Kanji

視inspection, regard as, see
直straightaway, honesty, frankness
径diameter, path, method

Similar words

角かく直ちょっ径けい
角直径 is a more general term for angular diameter, while 視直径 specifically refers to the apparent diameter as observed from Earth.

Etymology

Compound of 視 (visual, apparent) and 直径 (diameter), a straightforward technical term.