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Definition of Sea mile
1. Noun. A former British unit of length once used in navigation; equivalent to 6,000 feet (1828.8 meters). 
Medical Definition of Sea mile
1. A geographical mile. See Mile. Source: Websters Dictionary (01 Mar 1998)
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1. Noun. A former British unit of length once used in navigation; equivalent to 6,000 feet (1828.8 meters). 
1. A geographical mile. See Mile. Source: Websters Dictionary (01 Mar 1998)