Handrail on a staircase.
handrail definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
a rail serving as a guard or support to be held by the hand, as along a staircase or ramp
handrail definition by American Heritage Dictionary
A narrow railing to be grasped with the hand for support.