[{"word":"airmasses","phonetics":[],"meanings":[{"partOfSpeech":"noun","definitions":[{"definition":"A widespread body of air, the properties of which can be identified as: (a) having been established while that air was situated over a particular region of the Earth's surface (airmass source region) and (b) undergoing specific modifications while in transit away from the source region. An air mass is often defined as a widespread body of air that is approximately homogeneous in its horizontal extent, particularly with reference to temperature and moisture distribution; in addition, the vertical temperature and moisture variations are approximately the same over its horizontal extent.","synonyms":[],"antonyms":[]},{"definition":"The amount of air through which light from a celestial object passes, normalized to 1 for an object at zenith.","synonyms":[],"antonyms":[]}],"synonyms":[],"antonyms":[]}],"license":{"name":"CC BY-SA 3.0","url":"https://creativecommons.org/licenses/by-sa/3.0"},"sourceUrls":["https://en.wiktionary.org/wiki/airmass","https://en.wiktionary.org/wiki/airmasses"]}]