weather balloon
Noun
Meaning
weather balloon (plural weather balloons)
(meteorology) a balloon that carries meteorological instruments aloft in order to measure, record and return data concerning atmospheric pressure, temperature and humidity
Synonyms
Examples
The goal was to launch a weather balloon high into the air to collect pressure and temperature data to find the theoretical temperature at which molecules stop moving -- absolute zero.
Have you spotted a weather balloon that may have crash-landed in Kimpton?
He told that the debris recovered was not a weather balloon, and claimed it did not come from this planet.”