What's Trending Now
More Trending Words
black thread
noun
Definition of black thread
: a disease of the tapped area of the Para rubber tree that is caused by a fungus (Phytophthora meadii) and that is characterized by black lines extending through the exposed bast into the cambium or wood —called also black stripe, stripe canker
From the M-W Editors
There's more!
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 black thread? Please tell us where you read or heard it (including the quote, if possible).
Writing? Check your grammar now!