(astronomy) a numerical measure of the brightness of a star, planet etc.; a decrease of 1 unit represents an increase in the light received by a factor of 2.512

plural of heir apparent

true solar time as shown by a carefully adjusted sundial

The electric charge used in partial discharge test that if injected between the terminals of the device under test would change the voltage across the terminals by an amount equivalent to the partial discharge event.

plural of apparent temperature

The temperature perceived by humans, resulting from the combined effects of air temperature, relative humidity and wind speed. / Used other than figuratively or idiomatically: see apparent, temperature.

plural of apparent magnitude