selector

1. Someone or something which selects or chooses.

   a person who chooses or selects out

2. An administrator responsible for selecting which players will play for a side.

3. A matching expression in a stylesheet determining which elements in the markup are affected by a style.

4. A pointer to a structure describing a segment of memory.

5. (Internet, historical)A text string transmitted to a Gopher server, identifying the resource to be retrieved.

6. A disc jockey.

7. (Australia, historical)A person who is entitled to choose a tract of Crown land to purchase.

regular