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temperature-humidity index

[ tem-per-uh-cher-hyoo-mid-i-tee in-deksor, often, -yoo-, -pruh-, -per-cher-, -choor ]

noun

, Meteorology.
  1. a number representing an estimate of the potentially debilitating effect of temperature and relative humidity on humans and animals, especially livestock: computed essentially as a combination of dry-bulb temperature and wet-bulb temperature but formulaically specific to a given species, as heat-stress tolerances vary significantly from one species to another. : THI, T.H.I.


temperature-humidity index

noun

  1. an index of the effect on human comfort of temperature and humidity levels, 65 being the highest comfortable level
“Collins English Dictionary — Complete & Unabridged” 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012


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Word History and Origins

Origin of temperature-humidity index1

First recorded in 1955–60

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temperature gradienttemperature inversion