from The American Heritage® Dictionary of the English Language, 4th Edition
- n. The mass of cytoplasm surrounding the centriole in a centrosome.
- n. The central core of the earth. Also called barysphere.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. The cytoplasm surrounding the centriole of a centrosome.
- n. barysphere
from the GNU version of the Collaborative International Dictionary of English
- n. The nucleus or central part of the earth, forming most of its mass; -- disting. from
lithosphere, hydrosphere, etc.
- n. 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.
from The Century Dictionary and Cyclopedia
- n. In cytology, a spherical, differentiated mass of cytoplasm surrounding the centrosome and constituting a pole of the karyokinetic spindle during cell-division. Also called attraction-sphere.
- n. The central or interior portion of the earth, beginning at a somewhat indefinite depth, and involving materials and pressures of which we have no actual experience; contrasted with the successive outer shells, lithosphere, hydrosphere, and atmosphere.
centro- + -sphere (Wiktionary)