- a disease, especially of white pines, characterized by cankers and in the spring by blisters on the stems, caused by a rust fungus of the genus Cronartium.
Origin of blister rust
First recorded in 1915–20
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- a disease of certain pines caused by rust fungi of the genus Cronartium, causing swellings on the bark from which orange masses of spores are released