{ } a. [ Gr. ge`a, gh^, the earth + ke`ntron center: cf. F. géocentrique. ] (Astron.) (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. [ 1913 Webster ]

adv. In a geocentric manner. [ 1913 Webster ]

n. A genus of giant tortoises.
Syn. -- genus Geochelone. [ WordNet 1.5 ]

n. [ Gr. ge`a, gh^, the earth + chemistry. ] The study of the chemical composition of, and of actual or possible chemical changes in, the crust of the earth. -- Ge`o*chem"ic*al a. -- Ge`o*chem"ist n. [ Webster 1913 Suppl. ]

n. The genus of birds comprising the roadrunners.
Syn. -- genus Geococcyx. [ WordNet 1.5 ]

n. [ Gr. ge`a, gh^, the earth + Kro`nos Saturn, the alchemistic name of lead: cf. G. geokronit. ] (Min.) A lead-gray or grayish blue mineral with a metallic luster, consisting of sulphur, antimony, and lead, with a small proportion of arsenic. [ 1913 Webster ]

a. [ Gr. ge`a, gh^, the earth + ky`klos circle. ] 1. Of, pertaining to, or illustrating, the revolutions of the earth; as, a geocyclic machine. [ 1913 Webster ]

2. Circling the earth periodically. [ 1913 Webster ]

n. [ F. géode, L. geodes, fr. Gr. &unr_; earthlike; ge`a, gh^, the earth + e'i^dos form. ] (Min.) (a) A nodule of stone, containing a cavity, lined with crystals or mineral matter. (b) The cavity in such a nodule. [ 1913 Webster ]

a. [ Gr. ge`a, gh^, earth + 'adhfa`gos eating one's fill; gluttonous. ] (Zool.) Living in the earth; -- applied to the ground beetles.

n. A geodetic line or curve. [ 1913 Webster ]