from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A measurement of the air temperature in relation to the relative humidity, used as an indicator of the perceived temperature. Also called apparent temperature, humiture.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A figure used by American meteorologists to describe the apparent heat felt by a person as the result of a combination of temperature and humidity.
From heat + index (Wiktionary)