Which Joe gave his name to ‘sloppy joes’? We look at five interesting sandwiches and their lexical origins.
An atomic clock that uses the vibrations of caesium atoms as a time standard.
- ‘The idea behind the atomic clock (or the caesium clock) is to bombard cesium with microwaves of close to 9,192,631,770 cycles per second.’
- ‘Researchers are working to develop clocks as much as 1000 times as accurate as the current world-standard cesium clock.’
- ‘These are the nation's three primary clocks, caesium clocks that act as a reference for other atomic clocks around the world.’
- ‘Despite the fact that the ancients had no lasers, artificial satellites, radio telescopes, or cesium clocks, their accounts of eclipses have made it possible to build up a consistent picture of how the length of the day has changed.’
- ‘It is also used in the cesium clock, a device that measures time by means of the wavelength of light given off by one of the elements isotopes, cesium- 133.’
- ‘In a cesium clock, it has been determined that one second is equal to 9,192,631,770 oscillations or transitions.’
- ‘Thus I run an experiment which performs measurements on the cesium clock which gives me a basic calibration upon which all clocks can be run.’
- ‘Since the 1970's (when we developed stable lasers and accurate cesium clocks), we have calculated light speed from laser measurements.’
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Before you run for the hills, let’s run through a list of ‘run’ expressions that are running through our minds.
The definitions of ‘buddy’ and ‘bro’ in the OED have recently been revised. We explore their history and increase in popularity.