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

• orthodontics
• orthodontist
• orthodontists
• orthodox
• Orthodox Church
• Orthodox Churches
• Orthodox Eastern Church
• orthodoxies
• orthodoxly
• orthodoxy
• orthodromic
• orthodromics
• orthodromies
• orthodromy
• orthoepic
• orthoepical
• orthoepies
• orthoepist
• orthoepists
• orthoepy
• orthogeneses
• orthogenesis
• orthogenesist
• orthogenesists
• orthogenetic