12° definition, 12° meaning | English dictionary

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      n   pl   , -mos  
1    a book size resulting from folding a sheet of paper into twelve leaves,   (Also called)    twelvemo     (Often written)    12mo, 12°         
2    a book of this size  
     (C17: from Latin phrase in duodecimo in twelfth, from duodecim twelve)  
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