The Collaborative International Dictionary of English v.0.48:
Geocentric \Ge`o*cen"tric\, Geocentrical \Ge`o*cen"tric*al\, a.
[Gr. ge`a, gh^, the earth + ke`ntron center: cf. F.
(a) Having, considering, or based on, the earth as center;
as, the geocentric theory of the universe; in relation to
or seen from the earth, -- usually opposed to
heliocentric, as seen from the sun; as, the geocentric
longitude or latitude of a planet.
[1913 Webster + Webster 1913 Suppl.]
Geocentric latitude (of place) the angle included between
the radius of the earth through the place and the plane of
the equator, in distinction from geographic latitude. It
is a little less than the geographic latitude.