Definition of heartrot
: any of several rots involving the central part of a plant or plant organ: such as a : disintegration of the heartwood of a tree (as by fungi of the genus Fomes) b : a disease of beets and rutabagas caused by a fungus (Mycosphaerella tabifica) that brings about decay of the heart and blighting of the leaves c : a rot of sugar beets caused by boron deficiency
Love words? You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.
Start your free trial today and get unlimited access to America's largest dictionary, with:
- More than 250,000 words that aren't in our free dictionary
- Expanded definitions, etymologies, and usage notes
- Advanced search features
- Ad free!
Seen and Heard
What made you want to look up heartrot? Please tell us where you read or heard it (including the quote, if possible).