Source : Webster's Revised Unabridged Dictionary (1913)

Mac \Mac\ [Gael., son.]
   A prefix, in names of Scotch origin, signifying son.

Source : WordNet®

mac
     n : a waterproof raincoat made of rubberized fabric [syn: {macintosh},
          {mackintosh}, {mack}]

Source : Free On-Line Dictionary of Computing

Mac
     
        {Macintosh}

MAC
     
        1. {Media Access Control}.
     
        2. Early system on {Ferranti} {Mercury}.  Listed in CACM
        2(5):16 (May 1959).