Jisho

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Noun
1. air mass
2. married manSlang, Jocular, humorous term, See also 既男 きだん
Wikipedia definition
3. Air massIn meteorology, an air mass is a volume of air defined by its temperature and water vapor content. Air masses cover many hundreds or thousands of square miles, and adopt the characteristics of the surface below them. They are classified according to latitude and their continental or maritime source regions. Colder air masses are termed polar or arctic, while warmer air masses are deemed tropical. Continental and superior air masses are dry while maritime and monsoon air masses are moist.
Read “Air mass” on English Wikipedia
Read “気団” on Japanese Wikipedia
Read “Air mass” on DBpedia

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