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growth ring

noun
Origin of growth ring
1905-1910
First recorded in 1905-10
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for growth ring
Historical Examples
  • The summerwood constitutes a large part of the annual growth ring.

    American Forest Trees

    Henry H. Gibson
  • The wood is very strong, hard, and compact, and the annual growth ring is largely dense summerwood.

    American Forest Trees

    Henry H. Gibson
  • The wood is ring-porous, that is, the inner edge of the yearly growth ring has a row of large pores.

    American Forest Trees

    Henry H. Gibson
British Dictionary definitions for growth ring

growth ring

noun
1.
another name for annual ring
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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growth ring in Science
growth ring  

  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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Word Value for growth

13
13
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