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annual ring

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noun

an annual formation of wood in plants, consisting of two concentric layers, one of springwood and one of summerwood.

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Also called growth ring, tree ring.

Origin of annual ring

First recorded in 1875–80
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

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British Dictionary definitions for annual ring

annual ring

noun

a ring of wood indicating one year's growth, seen in the transverse section of stems and roots of woody plants growing in temperate climatesAlso 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

Scientific definitions for annual ring

annual ring

See under growth ring.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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