GEODETICS
Noun
geodetics (uncountable)
The scientific discipline that deals with the measurement and representation of the earth, its gravitational field and geodynamic phenomena (polar motion, earth tides, and tectonic motion) in three-dimensional, time-varying space.
Source: Wiktionary
Ge`o*det"ics, n.
Definition: Same as Geodesy.
GEODETIC
Ge`o*det"ic, Ge`o*det"ic*al, a.
Definition: Of or pertaining to gebdesy; obtained or determined by the
operations of geodesy; engaged in geodesy; geodesic; as, geodetic
surveying; geodetic observers. Geodetic line or curve, the shortest
line that can be drawn between two points on the elipsoidal surface
of the earth; a curve drawn on any given surface so that the
osculating plane of the curve at every point shall contain the normal
to the surface; the minimum line that can be drawn on any surface
between any two points.
Source: Webster’s Unabridged Dictionary 1913 Edition