roll-on 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.
designating any of various commercial products, as a deodorant lotion, that are applied to the skin by means of a rotating ball within the top of the dispenser
such a product
roll-on definition by American Heritage Dictionary
Of or being a substance, such as a deodorant, that is dispensed from a container having a rolling ball at one end serving as an applicator.
- rollˈ-onˌ noun