Secondary growth

secondary growth -- Growth in a plant which does not occur at the tips of the stems or roots. Secondary growth produces wood and bark in seed plants.
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secondary growth Cells in a plant that are produced by a cambium. Increase in girth of a plant due to the action of lateral meristems such as the vascular cambium. The main cell produced in secondary growth is secondary xylem, better known as wood.
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secondary growth
The increase in girth of the stems and roots of many plants, especially woody, perennial dicots.
secondary immune response ...
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secondary growth Growth derived from secondary or lateral meristems, the vascular and cork cambiums; secondary growth results in an increase in diameter or circumference; contrasted with primary growth, which results in an increase in length.
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Note that, in transitional stages of plants with secondary growth, the first two categories are not mutually exclusive, although usually a vascular bundle will contain primary xylem only.
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