a measure, on a scale of 0 to 11, of the intensity of ultraviolet radiation from the sun at the sun's highest point on a particular day in a particular place, a higher number indicating greater exposure.
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Word Lookups From Obama’s Farewell SpeechPresident Barack Obama’s second and final term is at an end. He gave his farewell speech Tuesday January 10 in Chicago, the city that launched his rise to national prominence. Word choices and speech patterns of our world leaders are a constant source of discussion (and comedy skits), as every administration has a style and at least one tic. Long known as an effective public …
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Science definitions for uv index
[ yōō′vē′ ]
A scale ranging from 0 to 10, used to estimate the risk for sunburn in midday sunlight, with 0 indicating no risk and 10 indicating maximal risk. The UV index is effectively a rough measure of the amount of harmful ultraviolet radiation in the sunlight reaching the Earth's surface at a given location, given the time of year and current atmospheric conditions, expressed in terms of the risks that are associated with exposure to that amount of radiation.
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