Multi-Dimensional Array

Question

Following is the two dimensional array with 2 rows and 3 columns.
int[,] ar = new int[2,3];

Example for three dimensional array is
int[,,] ar = new int[2,3,2];

Please tell me what is the name of third one. Also tell me how to name if it is go like this.
int[,,] ar = new int[row, column, ?????];