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annual ring

an annual formation of wood in plants, consisting of two concentric layers, one of springwood and one of summerwood.
Also called growth ring, tree ring.
Origin of annual ring
1875-80 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for annual ring

annual ring

a ring of wood indicating one year's growth, seen in the transverse section of stems and roots of woody plants growing in temperate climates Also called tree 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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Contemporary definitions for annual ring

See tree ring's 21st Century Lexicon
Copyright © 2003-2014, LLC
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annual ring in Science
annual ring  
See under growth ring.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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