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

• through the night
• through the nose
• through thick and thin
• through ticket
• through-ticketing
• through tickets
• through traffic
• through train
• through trains
• throughway
• throughways
• throve
• throw
• throw about
• throw a fit
• throw around
• throw a spanner in the works
• throw away
• throwaway
• throwaways
• throw a wobbly
• throw back
• throwback
• throwbacks
• throw caution to the winds