cube \cube\ k=ub, n. f. cube, l. cubus, fr. gr. ???? a
   cube, a cubical die.
   1. geom. a regular solid body, with six equal square sides.
      1913 webster

   2. math. the product obtained by taking a number or
      quantity three times as a factor; as, 4x4=16, and 16x4=64,
      the cube of 4.
      1913 webster

   cube ore min., pharmacosiderite. it commonly crystallizes
      in cubes of a green color.

   cube root. math., the number or quantity which,
      multiplied into itself, and then into the product,
      produces the given cube; thus, 3 is the cube root of 27,
      for 3x3x3 = 27.

   cube spar min., anhydrite; anhydrous calcium sulphate.
      1913 webster
see also:
cube ore cube root cube spar