Definition of penicillium
: any of a genus (Penicillium) of fungi (such as a blue mold) that are found chiefly on moist nonliving organic matter (such as decaying fruit) and have been grouped with the imperfect fungi but are now often placed with the ascomycetes
Test Your Vocabulary
Commonly Confused Words Quiz
-
- I went to the ______ store to buy a birthday card.

Test your vocabulary with our 10-question quiz!
TAKE THE QUIZ
A daily challenge for crossword fanatics.
TAKE THE QUIZLove words? Need even more definitions?
Merriam-Webster unabridged
Share penicillium
Time Traveler for penicillium
The first known use of penicillium was in 1867
See more words from the same year