Subjected to increased air or gas pressure above normal atmospheric levels. In aviation, it refers to aircraft cabins maintained at comfortable pressure despite high altitude.
From Latin 'pressura' meaning 'pressure' (from 'premere' 'to press') with the suffix '-ized'. The modern technical sense developed in the 20th century with advances in aviation and industrial applications.
Pressurized aircraft cabins are typically maintained at the equivalent of 6,000-8,000 feet altitude, even when flying at 40,000 feet—without this technology, passengers would lose consciousness in seconds! The technology was crucial for making high-altitude commercial flight practical and comfortable.
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