n.
Pronunciation: ' j ē - ˌ o ̇ id
Function: noun
Etymology: German, from Greek geoeid ē s earthlike, from g ē
Date: 1881
: 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 \ j ē - ' o ̇ i-d ə l \ adjective