rollon

Roll-on, often written roll-on or rollon, is a term with several meanings in cosmetics, shipping, and general usage. The most common meaning in consumer products refers to a roll-on deodorant or antiperspirant, which uses a small ball-bearing mechanism to apply a liquid formulation to the skin. The container holds a liquid or gel that is dispensed as the ball rotates against the skin, delivering product in a thin, even layer.

Formulations are typically water- or alcohol-based and may include fragrance, humectants, and active ingredients such as aluminum salts for antiperspirant action. Roll-ons are valued for clean, mess-free application and ease of use, though they can take longer to dry and may irritate very sensitive skin or leave a residue on clothing.

In maritime and logistics terminology, roll-on/roll-off (RO-RO) describes vessels designed to carry wheeled cargo that can be driven on and off the ship. RORO vessels use built-in ramps and decks to facilitate rapid loading and unloading of cars, trucks, and heavy equipment.

The term may also appear in branding or product naming, or describe other rolling-applicator devices such as perfume rollers or topical medication applicators. Spelling with or without a hyphen varies by language and brand.