[rohl-on, -awn]
packaged in a tubelike container one end of which is equipped with a rotating ball that dispenses and spreads the liquid content directly.
a roll-on preparation: spray deodorants and roll-ons.

1945–50; adj., noun use of verb phrase roll on Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
Cite This Source Link To roll-on

1. a dispenser of a liquid cosmetic (such as a deodorant) having a revolving ball as an applicator 
2. a woman's foundation garment rolled on to the hips 
WordNet® 3.0, © 2006 by Princeton University.
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Example sentences
Youngblood and his colleagues are currently developing less-expensive spray- or roll-on techniques for making the coating.
It uses a roll-on, roll-off system to transfer containers between trains and ships.
The military hire roll-on, roll-off ships to move tanks, supplies and equipment around.
My personal experience with roll-on luggage in remote places without roads is that you always can pay someone to carry it for you.
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