Former time standard

• Chronometric std
• See 63-Across
• All clocks are set by it (Abbr.)
• All clocks are set by it: Abbr.
• Letters that clocks are set by
• Clock setting standard (Abbr.)
• Clock-setting standard: Abbr.
• Clock standard letters
• Clock-setting std.

Wikipedia Word definitions in Wikipedia
GMT may mean: Greenwich Mean Time General American Transportation Corporation (GATX), a company which uses GMT as its stock symbol. Generic Mapping Tools in graphical computing Geometric measure theory Giant Magellan Telescope a ground-based telescope planned ...