| blister rust | (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, Syn. white-pine rust, white pine blister rust |
| blister rust | (n) fungus causing white pine blister rust and having a complex life cycle requiring a plant of genus Ribes as alternate host, Syn. Cronartium ribicola |