crown gall


: a disease that affects many species of plants and is caused by a bacterium (Agrobacterium tumefaciens) which forms tumorous enlargements usually just below the ground on the stem

Example Sentences

Recent Examples on the Web Understanding how the crown gall bacteria altered plant cells without destroying them was a critical breakthrough, one that opened an entirely new set of possibilities. Andrew Curry, Discover Magazine, 13 Mar. 2013 Plants can also get cancer, like the tree tumor known as a crown gall. New York Times, 25 May 2022 The tumorlike growths at the base of the trunk and on the rootball appear to be crown gall, Agrobacterium tumefaciens. oregonlive, 13 Mar. 2022 Common pests & diseases Black spot and powdery mildew are common fungal diseases, while crown gall disease may occur less commonly. Earl Nickel,, 7 Aug. 2020

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'crown gall.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Word History

First Known Use

1894, in the meaning defined above

Time Traveler
The first known use of crown gall was in 1894

Dictionary Entries Near crown gall

Cite this Entry

“Crown gall.” Dictionary, Merriam-Webster, Accessed 29 Jan. 2023.

More from Merriam-Webster on crown gall

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