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Meaning of roll-on

roll-on

Pronunciation: (rōl'on", -ôn"), [key]
— adj.
  1. packaged in a tubelike container one end of which is equipped with a rotating ball that dispenses and spreads the liquid content directly.
—n.
  1. a roll-on preparation: spray deodorants and roll-ons.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
roll-off rollout