Item

Arrays are frequently treated as having a frame of length 1. With this frame, the array has cells of rank 1 less than the rank of the array. These cells are the items of the array.

The items of a list are the atoms in the list. The items of a table are the rows in the table. The items of a rank 3 array are the tables in the array. An array is the list of its items.

An atom has one item, itself.

The # (tally) of a noun is the number of items in the noun.

   # 23
1

   # 1 $ 5
1

   # i. 5
5

   # i.2 3
2