Answer: geoid

AnswerCrossword Clue
GEOID

Surface like Earth's

GEOID

Imaginary surface coinciding with sea level

GEOID

Earthlike shape

GEOID
Mean sea-level line
GEOID
Imaginary surface coinciding with the earth's sea level
GEOIDEarth's surface, hypothetically
GEOIDEllipsoid geometric figure
GEOIDEllipsoid flattened at the poles
GEOIDGeographical geometric figure
GEOIDEarth's shape, hypothetically
GEOIDEarth's shape