noun \ˈjē-ˌid\

Definition of GEOID

:  the surface within or around the earth that is everywhere normal to the direction of gravity and coincides with mean sea level in the oceans
ge·oi·dal \jē-ˈi-dəl\ adjective

Origin of GEOID

German, from Greek geoeidēs earthlike, from
First Known Use: 1881


Next Word in the Dictionary: geoisotherm
Previous Word in the Dictionary: geohydrology
All Words Near: geoid

Seen & Heard

What made you want to look up geoid? Please tell us where you read or heard it (including the quote, if possible).