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growth ring
growth ring
growth ring
- A layer of wood formed in a plant during a single period of growth. Growth rings are visible as concentric circles of varying width when a tree is cut crosswise. They represent layers of cells produced by vascular cambium.
- ◆ Most growth rings reflect a full year's growth and are called annual rings. But abrupt changes in the environment, especially in the availability of water, can cause a plant to produce more than one growth ring in a year.
- See more at dendrochronology
- A similar layer in a part of an animal marking a period of growth, such as an annulus in a fish scale.
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Word History and Origins
Origin of growth ring1
First recorded in 1905–10
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Example Sentences
The summerwood constitutes a large part of the annual growth ring.
From Project Gutenberg
At this time the formation of a major growth-ring is completed.
From Project Gutenberg
The wood is very strong, hard, and compact, and the annual growth ring is largely dense summerwood.
From Project Gutenberg
The wood is ring-porous, that is, the inner edge of the yearly growth ring has a row of large pores.
From Project Gutenberg
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