Definition of frost ring
: a false annual ring in the trunk of a tree that is often evident only as a brownish line of collapsed or abnormal cells and is caused by defoliation due to frost and subsequent leafing out again
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“Frost ring.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/frost%20ring. Accessed 27 May. 2022.
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Time Traveler for frost ring
The first known use of frost ring was in 1896
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