noun
secondary growth
Botanical term referring to the increase in thickness of stems and roots in woody plants, resulting from the activity of the vascular cambium.
樹木の二次成長によって年輪が形成される。
Annual rings are formed by the secondary growth of trees.
Primary growth refers to the elongation of stems and roots, while secondary growth increases their thickness.
Compound of 二次 (secondary) and 成長 (growth). The term is a direct translation of the English botanical term 'secondary growth'.