growth ring

noun

Origin:
1905–10

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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Collins
World English Dictionary
growth ring
 
n
another name for annual ring

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Science Dictionary
growth ring  


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  1. 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.

  2. A similar layer in a part of an animal marking a period of growth, such as an annulus in a fish scale.


The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
Legal scallops possess a defined, raised, annual growth ring.
Legal scallops possess a defined raised annual growth ring.
The ring closest to the bark is the youngest and final growth ring.
The ring closest to the center of the tree is the oldest growth ring.
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