1. (cosmology) one billion (10^9) years
   "the universe is approximately 14 gigayears old"

Encyclopedia: Gigayear

• pancake landing
• pancake turner
• pancake turtle
• pancake-like
• pancake-style
• pancarditis
• pancetta
• panchayat
• panchayet
• Panchen Lama
• Pancho Villa
• panchromatic
• panchromatic film
• pancratium
• pancreas
• pancreatectomy
• pancreatic
• pancreatic artery
• pancreatic cancer
• pancreatic duct
• pancreatic fibrosis
• pancreatic juice
• pancreatic vein
• pancreatin
• pancreatitis