See Also: geoid(dictionary)

geoid (iou)



geoid noun. L19.
[Greek geoeides adjective, earthlike, from GEO-: see -OID.]
The earth's figure; a hypothetical solid figure the surface of which corresponds to mean sea level (and its imagined extension under land) and is perpendicular to the direction of gravity at all points.
ge'oidal adjective L19.