centro-, centr-, centri-, kentro-

(Greek > Latin: center; middle point, mid point; focus, focal point, focalize; zero in on)

This element originally meant "sharp point, goad" or "spur".

centrodorsal (adjective), more centrodorsal, most centrodorsal
1. Having the food yolk placed at the center of the ovum, segmentation being either regular or unequal.
2. Having the yolk centrally located; such as, in the ova of arthropods, or a description of an egg with the yolk in the middle.
The cinched "waist" of the chromosome which is essential for the division and the retention of the chromosome in the cell.

The centromere is a uniquely specialized region of the chromosome to which spindle fibers attach during cell division.

Centrosaurus, Centrosaur
A "sharp-point (spur) lizard" from Late Cretaceous Alberta, Canada. Named by Canadian paleontologist Lawrence M. Lambe in 1904.
1. The microtubule organizing center which, in animal cells, surrounds the centriole and which will divide to organize the two poles of the mitotic spindle.

By directing the assembly of a cells skeleton, this organelle controls division, motility and shape.

2. A small region of cytoplasm near the nucleus of a cell.

In animal cells, it contains rod-shaped structures from which the spindle fibers centrioles develop in cell division.

The central or interior portion of the earth.
Relating to or being the center of motion.
A thick mass of bone in a vertebra that is the point of attachment to the vertebrae above and below.
circumcenter (s) (noun), circumcenters (pl)
The middle of a sphere: The circumcenter is the middle of a round object.
coaxial needle electrode, concentric needle electrode (s) (noun); coaxial needle electrodes, concentric needle electrodes (pl)
A recording electrode consisting of an insulated metal wire inside a hollow stainless steel cannula.

Differences in potential are measured using the needle shaft as a reference and the wire tip as the exploring electrode.