Definition of "microradian" []

• A unit of angle equal to one millionth of a radian (noun)

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• "Thanks to their compact size and Firewire connectivity, HASO FIRST wavefront sensors are surprisingly easy to deploy and provide exceptionally accurate and reliable measurements at speeds up to 60 Hz. Imagine Optic's SH-LTP is the ideal solution for performing highly accurate, bidimensional, sub-microradian characterization of large optical component surfaces and planeness of semiconductor wafers."
• "The diminishment of incandescence is due to the plume changing from translucent to opaque with rock dust. tonne: metric unit equal to 1,000 kilograms, 2,204.6 lbs, or 1.1 English tons. microradian: a measure of angle equivalent to 0.000057 degrees. ppm: parts-per-million; 10,000 ppm = 1 \%. littoral cone: usually small cones built near active ocean entries; the cones are constructed of tephra from steam explosions that are sometimes produced when 1,150 degree C lava enters the 25 degree C ocean. incandescence: the production of visible light from a hot surface."
• "The tiltmeter on the north flank of Pu ` u ` O ` o recorded about one microradian of inflation between 4: 15 pm and 10 pm last night, nearly coincident with a doubling of seismic tremor; the geophysical event was also coincident with a rain event that was probably too small (0.4 cm or"