DuckCorp Dico

Found 2 definitions

1.                 From Japanese-English FreeDict Dictionary ver. 0.1:
                   
   
   
                   
                     
   Ｘ /lˈe̞təˈe̞fˈe̞fɡˈo̞hˈätsi/, ｘ /lˈe̞təˈe̞fˈe̞fɡˈo̞hˈätsi/, エックス /e̞kkˈɯᵝsɯᵝ/
   1. (noun (common) (futsuumeishi))
   X, x
   2. unknown quantity, an unknown
   
                   
                 

2.                 From Japanese-English FreeDict Dictionary ver. 0.1:
                   
   
   
                   
                     
   Ｘ /lˈe̞təˈe̞fˈe̞fɡˈo̞hˈätsi/, ｘ /lˈe̞təˈe̞fˈe̞fɡˈo̞hˈätsi/, エックス /e̞kkˈɯᵝsɯᵝ/
   1. (noun (common) (futsuumeishi))
   X, x
   2. unknown quantity, an unknown