centrosphere

• POS: Noun
• HYPHEN: cen=tro=sphere

CIDE DICTIONARY

centrosphere, n. [Gr. centre + sphere.].

•  The nucleus or central part of the earth, forming most of its mass; -- disting. from lithosphere, hydrosphere, etc.  [Webster 1913 Suppl.]
•  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.  [Webster 1913 Suppl.]