How to use growth ring in a sentence
On three of the finds, Kuitems and Dee, both of the University of Groningen in the Netherlands, and their team identified an annual tree growth ring that displayed a signature spike in radiocarbon levels.Vikings lived in North America by at least the year 1021 | Bruce Bower | October 20, 2021 | Science News
We cored the largest mangrove trees at three sites, extracting pencil-shaped samples from their trunks that showed their growth rings, to get a sense of how long these trees lived—about 100 years—and how many generations of trees had lived there.This secret mangrove forest is unlike any other in the world | Sula E Vanderplank/The Conversation | October 19, 2021 | Popular-Science
In the late 19th century, the Finnish physicist Karl Selim Lemström observed that the width of growth rings in fir trees near the Arctic Circle followed the cycle of the aurora borealis, widening when the northern lights were strongest.Cold plasma could transform the sustainable farms of the future | Stephen Ornes | September 8, 2021 | Science News
To determine the age of a fish, scientists count growth rings on their scales, much like tallying the rings of a tree trunk.These ancient deep-sea fish can live five times as long as biologists expected | Sara Kiley Watson | June 25, 2021 | Popular-Science
Past studies observed these growth rings with reflected light, like that found in a flashlight.These ancient deep-sea fish can live five times as long as biologists expected | Sara Kiley Watson | June 25, 2021 | Popular-Science
The summerwood constitutes a large part of the annual growth ring.
At this time the formation of a major growth-ring is completed.
The wood is very strong, hard, and compact, and the annual growth ring is largely dense summerwood.
The wood is ring-porous, that is, the inner edge of the yearly growth ring has a row of large pores.
British Dictionary definitions for growth ring
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
Scientific definitions for growth ring
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.
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 © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.