Definition of cambium in US English:



  • A cellular plant tissue from which phloem, xylem, or cork grows by division, resulting (in woody plants) in secondary thickening.

    • ‘The cambium produces phloem tissue to the outside and xylem tissue to the inside.’
    • ‘Vascular secondary growth results from the activity of the vascular cambium, which produces secondary phloem and secondary xylem.’
    • ‘The outer ring of the stem contains all the functional tissue, including xylem, cambium, phloem, supporting tissues, and epidermis.’
    • ‘Small blocks of tissue, including cambium and the adjacent phloem and xylem, were cut with a sharp knife and a chisel from the stem of a single specimen of K. pictus that was growing on the campus of Hokkaido University.’
    • ‘Vessels differentiate immediately beneath the vascular cambium in the late-formed xylem.’


Late 16th century (denoting one of the alimentary humors once supposed to nourish the body): from medieval Latin, ‘change, exchange’.