Which Joe gave his name to ‘sloppy joes’? We look at five interesting sandwiches and their lexical origins.
A device consisting of two reflecting glass plates, employed for measuring small differences in the wavelength of light using the interference it produces.
- ‘Our products range from simple condenser lenses to precision etalons.’
- ‘The change in resonance frequency of the etalon measures the change in optical-path length.’
- ‘We specialize in very large aperture etalons with diameters up to 150 mm.’
Early 20th century: from French étalon, literally standard of measurement.
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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.