Oxia (Ancient Greek: ὀξεῖᾰ, Modern Greek: οξεία) may refer to:

• the acute accent in polytonic Greek
• Oxeia, a Greek island
• a 1988 concept car by Peugeot
• Oxia Chaos, a chaos terrain on the planet Mars
• Oxia Colles, a mountain range on the planet Mars
• Oxia Palus quadrangle, one of the 30 quadrangles of the plant Mars
• Oxia Planum, a plain on the planet Mars

This disambiguation page lists articles associated with the title Oxia.
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