noun, plural pen·i·cil·li·ums, pen·i·cil·li·a [pen-uh-sil-ee-uh] /ˌpɛn əˈsɪl i ə/.
any fungus of the genus Penicillium, certain species of which are used in cheesemaking and as the source of penicillin.
Origin of penicillium
< New Latin,
equivalent to Latin pēnicill(us
) brush (see pencil
) + -ium -ium
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
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British Dictionary definitions for penicillium
noun plural -cilliums or -cillia (-ˈsɪlɪə)
any ascomycetous saprotrophic fungus of the genus Penicillium, which commonly grow as a green or blue mould on stale food: some species are used in cheese-making and others as a source of penicillin
Word Origin for penicillium
C19: New Latin, from Latin pēnicillus tuft of hairs; named from the tufted appearance of the sporangia of this fungus
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
n. pl. pen•i•cil•li•ums
Any of various bluish-green fungi of the genus Penicillium that grow as molds on decaying fruits and ripening cheese and are used in the production of penicillin.
A genus of fungi of the class Ascomycetes, some species of which yield several antibiotic substances and biologics.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Plural penicilliums penicillia
Any of various bluish-green fungi of the genus Penicillium, that grow as molds on decaying fruits, ripening cheeses, and bread, and are used to produce penicillin and certain other antibiotics.
The American Heritage® Science Dictionary
Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.