omicron /ō-mīˈkron, ōˈmi- or omˈi-/

1. The fifteenth letter of the Greek alphabet, short o (Ο, ο)
2. As a numeral οˈ =70, ˌο = 70000

• rockets
• rocket science
• rocket scientist
• rocket scientists
• rockfall
• rockfalls
• Rock fever
• rockfish
• rockfishes
• rock flour
• rock-forming
• rock garden
• rock gardens
• rock guano
• rock-hewn
• rockhopper
• rockhoppers
• rock house
• rock houses
• rockier
• rockiers
• rockiest
• rockily
• rockiness
• rockinesses