View your list of saved words. (You can log in using Facebook.)
About Our Definitions: All forms of a word (noun, verb, etc.) are now displayed on one page.
Definition of PENICILLIUM
: any of a genus (Penicillium) of fungi (as a blue mold) that are found chiefly on moist nonliving organic matter (as decaying fruit) and have been grouped with the imperfect fungi but are now often placed with the ascomycetes
capitalized: a genus of fungi (as the blue molds) that have been grouped with the imperfect fungi but are now often placed with the ascomycetes and that are found chiefly on moist nonliving organic matter (as decaying fruit), are characterized by the erect branching conidiophores ending in tufts of club-shaped cells from which conidia are formed in chains, and include molds useful in economic fermentation and the production of antibiotics
pluralpen·i·cil·lia\-ē-ə\: any mold of the genus Penicillium