primary growth

primary growth

noun Botany.
growth in vascular plants, especially an increase in length, that results from cell division and differentiation of an apical meristem.
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Science Dictionary
primary growth  
Growth in vascular plants resulting from the production of primary tissues by an apical meristem. The plant body grows lengthwise chiefly by the enlargement of cells produced by the apical meristem (rather than by cell division). Because they lack secondary tissues, most monocots and herbaceous plants grow solely by primary growth until they reach maturity, when growth stops. Compare secondary growth.
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