Active optics
noun (functioning as sing)
a system to compensate for any deformation caused by gravity in the surface accuracy and alignment of the mirrors of an astronomical telescope by means of actuators that control the movable mirror supports
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active principle active principle n. A constituent of a drug, usually an alkaloid or glycoside, on which the characteristic therapeutic action of the substance largely depends. Historical Examples Is it used by nerves as food, or used by lungs, heart, or any organ as an active principle in the magnetic or electric forces? Philosophy of […]
- Active reason
an activity of intellect, embodying universal truth, potentially present in the mind of every individual, and when present, forming the only immortal part of the individual. Historical Examples But to this doctrine Aristotle makes an exception in favour of the active reason. A Critical History of Greek Philosophy W. T. Stace On the other hand, […]
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noun the practice of taking measures to avoid accidents, as opposed to merely reducing their consequences Compare passive safety
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the status of full-time service: on active duty. Contemporary Examples The Chinese military has a new stealth jet, but what messages are they sending as it is prepared for active service? Beijing’s New Stealth Jet: Made in China Brendon Hong November 15, 2014 Style-wise, there has perhaps been just one outfit that could be described […]