An Australian eucalyptus tree with dark-colored bark on its trunk or butt (lower section).
Compound of 'black' and 'butt' (Old English 'butte', the lower part of something). Named for the distinctive dark bark at the base of the tree.
Eucalyptus trees are pyrophobic—they actually need fire to open their seed pods—and the dark, thick bark of blackbutts protects the tree from the intense heat of Australian bushfires.
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