nju:?t?unj?n adj. of or devised by Isaac Newton (see NEWTON). °Newtonian mechanics the system of mechanics which relies on Newton's laws of motion concerning the relations between forces acting and motions occurring. Newtonian telescope a reflecting telescope with a small secondary mirror at 45█ to the main beam of light to reflect it into a magnifying eyepiece.
Last updated: 9/3/2011 12:48:30
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