1. The study of planets, planetary systems and the solar system
   - planetology

Encyclopedia: Planetary science

• Picus viridis
• PID
• piddle
• piddle away
• piddling
• piddock
• pidgin
• Pidlimdi
• pie
• pie chart
• pie crust
• pie in the sky
• pie shell
• pie-dog
• pie-eyed
• piebald
• piebald horse
• piece
• piece goods
• piece of ass
• piece of cake
• piece of cloth
• piece of eight
• piece of furniture
• piece of ground