ultra-high-temperature processing; UHT; ultra-pasteurization
Technical term used in food processing, especially for dairy products, to sterilize by briefly heating to very high temperatures.
UHT-processed milk can be stored at room temperature.
Low-temperature pasteurization, which uses lower heat over a longer time, preserving more flavor but requiring refrigeration.
Compound of 超 (ultra-), 高温 (high temperature), and 殺菌 (sterilization).