an annual formation of wood in plants, consisting of two concentric layers, one of springwood and one of summerwood.
Origin of annual ring
First recorded in 1875–80
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
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
See under growth ring.
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