Concentric circles of wood growth visible in tree cross-sections, with each ring typically representing one year of growth. Rings consist of light-colored spring wood and darker summer wood.
From Latin 'annualis' meaning 'yearly' and Old English 'hring' meaning 'circle.' The term directly describes the circular patterns that mark each year's growth cycle in temperate trees.
Annual rings are nature's history books, recording not just the tree's age but also climate conditions, droughts, fires, and even insect outbreaks! Wide rings indicate good growing years, while narrow rings reveal stress from drought, cold, or competition.
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