/tem"peuhr euh cheuhr hyooh mid"i tee/ or, often, /-yooh-, -preuh-, -peuhr cheuhr-, -choor'/
a number representing an estimate of the effect of temperature and moisture on humans, computed by multiplying the sum of dry-bulb and wet-bulb temperature readings by 0.4 and adding 15, with 65 assumed as the highest comfortable index. Abbr.: T.H.I. Cf. heat index .