Source : WordNet®

ED
     n : impotence resulting from a man's inability to have or
         maintain an erection of his penis [syn: {erectile
         dysfunction}, {male erecticle dysfunction}]

Source : Free On-Line Dictionary of Computing

ed
     
         (editor) {Unix}'s {line editor}.  Ed is rarely
        used by humans since even {vi} is better.
     
        {Unix manual page}: ed(1).
     
        (1999-03-01)