The answer would be viewpoint also, point of view, how people perceive things<span />
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The answer would be luc, lum, lun & lus. Since they all came from Latin lux, lucis & lume which means all light. Luminary, to bring light to the eye or luminescence which means a giving out of light by a material not coming from heat. Lucent means to produce light. So any word that has those Latin roots can be an invention's name.
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