Night snakes, 10 letters
Musk kangaroos, 14 letters
The scientific study of the earth's configuration above sea level (emphasizing the measurement of land altitudes relative to sea level), 11 letters
Measurement of the elevation of land above sea level, 11 letters
An altimeter that uses the boiling point of water to determine land elevation, 10 letters
Measurement of the elevation of land above sea level, 10 letters