geomagnetism /jē-ō-magˈnə-ti-zm/

1. The magnetism of the earth, earth's magnetic field
2. The study of this

geomagnetˈic adjective

geomagˈnetist noun

• pernickety
• pernoctate
• pernoctated
• pernoctates
• pernoctating
• pernoctation
• pernoctations
• Pernod
• perns
• perogi
• perogies
• perone
• peroneal
• perones
• peroneus
• peroneuses
• Peronism
• Peronismo
• Peronist
• Peronista
• perorate
• perorated
• perorates
• perorating
• peroration