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AM is an abbreviation for two things. The one which means morning is an abbreviation of the Latin phrase "ante meridionem", meaning "before mid-day", the A standing for the Latin word "ante", meaning "before" and well known to gamblers as the name for a bet you place before the game starts. The other AM is a kind of radio transmission and is an abbreviation for "amplitude modification", the A standing for the word "amplitude".

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9y ago

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