Beg'ment

[L. segmenium; secare, to cut.] i. A section, a part of an organ or other structure delimited naturally, artificially, or in the imagination from the remainder. 2. Metamere. 3. To reproduce by budding. 4. To divide and redivide into minute equal parts, interann'ular 6., the portion of a nerve-fiber between two succe ive nodes of Ranvier. lower u'terine s., the inferior portion of the uterus which must be dilated in order to allow of the expulsion of the fetus in parturition, prim'itive s., somite, b. o the spi'nal cord, a portion of the spinal cord corresponding to the line of attachment of one pair of spinal nerves, upper u'terine s., the main portion of the body of the gravid uterus, the contraction of which furnishes the chief force of expulsion in labor.