American Heritage® Dictionary of the English Language, Fourth Edition
- n. Any of several diseases of pine trees caused by certain fungi of the genus Cronartium, resulting in conspicuous blistering and often dieback of affected areas.
- n. fungus causing white pine blister rust and having a complex life cycle requiring a plant of genus Ribes as alternate host
- n. any of several diseases of pines caused by rust fungi of the genus Cronartium and marked by destructive invasion of bark and sapwood and producing blisters externally
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