Geocentric, Geocentrical

[Fr. géocentrique, from Gr. ge, the earth, and kentron, a centre or sharp point. ( Astron.) An expre ion applied to the position of a planet as it would appear to an observer stationed at the centre of the earth. It is in opposition to the term heliocentric, which is used to denote a planet's position as it would be seen by an observer at the centre of the sun. Geocen'trically, adv . In a geocentric manner. Geocer'ellite, n. ( Min .) An oxygenated hydro-carbon, obtained from the dark-brown coal of Gesterwitz. It is white, brittle, soluble in hot alcohol, and melts at 144°. Comp . Carbon 78-61, hydrogen 1270, oxygen 8-69. Geocer'ic Acid, n. The chemical name for GEOCERELLITE, q. v.