segment

n. 1 each part into which a thing is or can be divided. 2 part of a circle or sphere etc. Cut off by an intersecting line or plane. v. Usu. Divide into segments.  segmental adj. Segmentation n. [latin seco cut]

n. One of the parts into which any body naturally separates or is divided; a part divided or cut off; a section; a portion; as, a segment of an orange; a segment of a compound or divided leaf.