noun
Universal Time; UT
Technical term for the time standard based on the Earth's rotation; often used in astronomy and timekeeping contexts.
世界時は、グリニッジ標準時とほぼ同じです。
Universal Time is almost the same as Greenwich Mean Time.
Greenwich Mean Time (GMT), historically used as the world's time standard; 世界時 is the modern astronomical successor.
Compound of 世界 (world) and 時 (time), likely a calque of English 'Universal Time'.