penicillus

[ pĕn′ĭ-sĭləs ]

n. pl. pe•ni•cil•li (-sĭlī)

Any of the tufts formed by the repeated subdivision of the minute arterial twigs in the spleen.
Any of the complex systems of branches bearing organs that produce conida organs in fungi of the Penicillium.

QUIZZES

THINK YOU’VE GOT A HANDLE ON THIS US STATE NICKNAME QUIZ?

Did you ever collect all those state quarters? Put them to good use on this quiz about curious state monikers and the facts around them.
Question 1 of 8
Mississippi’s nickname comes from the magnificent trees that grow there. What is it?
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.