| Answer | Crossword Clue |
|---|---|
| GEOID | Imaginary surface coinciding with sea level |
| GEOID | Imaginary surface coinciding with the earth's sea level |
| geoidal | imaginary surface that coincides with mean sea level in the ocean and its extension through the continents |
| geoid | imaginary surface that coincides with mean sea level in the ocean and its extension through the continents |
| geoids | imaginary surface that coincides with mean sea level in the ocean and its extension through the continents |
| orometer | aneroid barometer with a scale giving elevations above sea level, used to determine land-surface altitudes |
| 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 |
