Armstrong line

English Alternative forms en Armstrong's line Etymology en Harry George Armstrong = 1899 1983, who determined this limit. Proper noun The altitude above sea level at which water boils without a pressurized environment, and at which a person would require a pressure suit or pressurized environment to survive, and avoid having their bodily fluids boil away. en Armstrong's line Armstrong limit Coordinate terms en Kármán line McDowell line mesopause death zone Translations altitude at which water boils without a pressurized environment Portuguese: pt linha de Armstrong f Further reading Armstrong limit