Centrosphere

Definition of Centrosphere

Cen´tro`sphere

n.	1.	(Geol.) The nucleus or central part of the earth, forming most of its mass; - disting. from lithosphere, hydrosphere, etc.
	2.	(Biol.) The central mass of an aster from which the rays extend and within which the centrosome lies when present; the attraction sphere. The name has been used both as excluding and including the centrosome, and also to designate a modified mass of protoplasm about a centrosome whether aster rays are developed or not.

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