Cite
 

Meaning of extender

ex•tend•er

Pronunciation: (ik-sten'dur), [key]
— n.
  1. a substance added to another substance, as to paint or food, to increase its volume or bulk: to add cereal and soy protein to hamburger as extenders.
  2. See under(def. 8).
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.