[mass noun] A cellular plant tissue from which phloem, xylem, or cork grows by division, resulting (in woody plants) in secondary thickening.
- ‘The outer ring of the stem contains all the functional tissue, including xylem, cambium, phloem, supporting tissues, and epidermis.’
- ‘Vascular secondary growth results from the activity of the vascular cambium, which produces secondary phloem and secondary xylem.’
- ‘Vessels differentiate immediately beneath the vascular cambium in the late-formed xylem.’
- ‘The cambium produces phloem tissue to the outside and xylem tissue to the inside.’
- ‘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.’
Late 16th century (denoting one of the alimentary humours once supposed to nourish the body): from medieval Latin, change, exchange.
We take a look at several popular, though confusing, punctuation marks.