Oxo or OXO may refer to:

Look up oxo- in Wiktionary, the free dictionary.

• Oxo (crater), an impact crater located in dwarf planet Ceres

• Oxo (food), a brand of food products in the UK, South Africa and Canada
• Oxo Tower, a London landmark formerly owned by the makers of Oxo food products
• OXO (kitchen utensils brand), a US-based manufacturer of ergonomic handheld kitchen utensils

• Oxo ligand, a divalent ligand
• oxo-, a prefix in the formal IUPAC nomenclature for the functional group '=O' (a substituent oxygen atom connected to another atom by a double bond)
• Hydroformylation, an industrial process for the production of aldehydes from alkenes
• Oxo Biodegradable, degradation resulting from oxidative and cell-mediated phenomena, either simultaneously or successively
• Oxo alcohol, alcohols that are prepared by adding carbon monoxide (CO) and hydrogen

• OXO (video game), the first digital graphical computer game, a version of tic-tac-toe from 1952

• OXO (band), an 80s New Wave pop band
• "OXO", a 2015, number one US dance song, by Olivia Somerlyn

• Oxo (horse), a racehorse, winner of the 1959 Grand National

• Tic-tac-toe (OXO, and various other synonyms) a pen-and-pencil game

• Tic Tac Toe (disambiguation)
• Noughts and crosses (disambiguation)

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