超低温 chāodīwēn ultralow temperature Origin Definitions Defs Strokes Stroke Words Sentences Sents 超 chāo adverb super- (bound form) Prefix meaning super-, ultra-, or extra-; occurring at a level significantly higher (or lower) than the normal standard.低温 低溫 dīwēn noun low temperature a temperature that is low or lower than normal, such as freezing weather or medical hypothermia