Plural of dah; the long sound or signal in Morse code (contrasted with 'dit' for short signals).
From imitative origin—'dah' mimics the sound of a longer signal or dash in Morse code, with 'dahs' being the simple plural of repeated long signals.
Morse code operators developed their own vocabulary—a message is built from 'dits' and 'dahs,' and experienced operators could 'hear' messages like language, recognizing patterns as naturally as reading!
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