cursor

Short definition from Wiktionary

Noun

1. 1
   A part of any of several scientific or measuring instruments that moves back and forth to indicate a position.
2. 2
   A moving icon or other representation, usually called a pointer, of the position of the pointing device.
3. 3
   An indicator, often a blinking line or bar, indicating where the next insertion or other edit will take place.
4. 4
   A reference to a row of data in a table, which moves from row to row as data is retrieved by way of it.
5. 5
   A design pattern in object oriented methodology in which a collection is iterated uniformly.

Verb

1. 1
   To navigate by means of the cursor keys.