U. formosa may refer to:

• Uluella formosa, a jumping spider
• Urophora formosa, a fruit fly

• CosmicOS
• Cosmic Osmo and the Worlds Beyond the Mackerel
• Cosmic Osmo (game)
• Cosmic pluralism
• Cosmic radiation
• Cosmic ray
• Cosmic Ray
• Cosmic-ray
• Cosmic ray paradox
• Cosmic Rays
• Cosmic ray spallation
• Cosmic ray visual phenomena
• Cosmic Rough Riders
• Cosmic Slop
• Cosmic Sounds
• Cosmic string
• Cosmic strings
• Cosmic Thing
• Cosmic Trigger
• Cosmic Trigger: Final Secret of the Illuminati
• Cosmic Trigger II: Down to Earth
• Cosmic Trigger III: My Life After Death
• Cosmic Trigger I: The Final Secret of the Illuminati
• Cosmic variance
• Cosmic x-ray source