Merriam-Webster Logo
SINCE 1828
Menu
dictionary thesaurus

Lactarius

noun
Lac·​ta·​ri·​us | \ lakˈta(a)rēəs, -ter-, -tār-\

Definition of Lactarius

: a large genus of white-spored agarics (family Agaricaceae) that exude a white or colored milky juice when cut or broken and that include an edible species (L. deliciosus) and some poisonous ones

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!

History and Etymology for Lactarius

New Latin, from Latin, milky

Keep scrolling for more

Learn More about Lactarius

Share Lactarius

Dictionary Entries near Lactarius

lacrosse stick

lact-

lactalbumin

Lactarius

lactary

lactase

lactate

Statistics for Lactarius

Look-up Popularity

Comments on Lactarius

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

Show Comments  Hide Comments 

WORD OF THE DAY

bower

Listen to the pronounciation of bower

a shady place in a garden or forest

Get Word of the Day daily email!

Test Your Vocabulary

Original Meanings Quiz

  • rembrandt-painting-a-young-scholar-and-his-tutor
  • Which of the following is the earliest known sense of the word awe?
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

TAKE THE QUIZ
Word Winder's CrossWinder

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