vascular bundle; fibrovascular bundle
Botanical term for the strand of conducting tissue in plants, consisting of xylem and phloem.
When you look at a cross-section of the stem under a microscope, the vascular bundles are arranged in a ring.
vascular cambium; wood cambium
The term is composed of 維 (fiber), 管 (tube), and 束 (bundle), reflecting its structure. The exact historical derivation is uncertain; it is a modern scientific term.