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

• cirques
• cirrate
• cirrhipede
• Cirrhipedia
• cirrhopod
• Cirrhopoda
• cirrhoses
• cirrhosis
• cirrhotic
• cirri
• cirriform
• cirrigrade
• cirriped
• cirripede
• cirripedes
• Cirripedia
• cirripeds
• cirro-cumuli
• cirro-cumulus
• cirrose
• cirro-strati
• cirro-stratus
• cirrous
• cirrus
• cirsoid