extender
(noun)
noun
1. Any of various substances designed to extend any of several properties of a material.
2. Any of various components designed to extend the length of a device.
3. Any substance added to food to bulk it out, with a higher protein content than a filler.
- Soy protein is used as a meat extender.
4. (climbing) A runner, or quick-draw. (from sense #2)
5. (linguistics) A phrase that extends an expression to include further members of a set, e.g. "and stuff", "or something".