Merriam-Webster Logo
SINCE 1828
Menu
dictionary thesaurus

blue rot

noun

Definition of blue rot 

: a disease of conifers caused by certain fungi (genus Ceratostomella) and producing a blue coloration of the wood

— called also bluing

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!

Learn More about blue rot

Dictionary Entries near blue rot

blue-rinsed

blue-roan

blue rock

blue rot

blue runner

blues

blue sage

Statistics for blue rot

Look-up Popularity

Comments on blue rot

What made you want to look up blue rot? Please tell us where you read or heard it (including the quote, if possible).

Show Comments  Hide Comments 

WORD OF THE DAY

atone

to make amends

Get Word of the Day daily email!

Test Your Vocabulary

Musical Words Quiz

  • gramophone
  • Which word describes a musical performance marked by the absence of instrumental accompaniment?
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
Syn City

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

Words at Play

Ask the Editors

Word Games