noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   A disease producing decay in the hearts of trees, caused by the mycelia of various fungi. uncountable
2. 2
   any plant disease in which the central part of a plant rots (especially in trees) wordnet

Etymology

From heart + rot.

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.