penicillium

noun, plural pen·i·cil·li·ums, pen·i·cil·li·a [pen-uh–sil-ee-uh] /ˌpɛn əˈsɪl i ə/.

1. any fungus of the genus Penicillium, certain species of which are used in cheesemaking and as the source of penicillin.

noun plural -cilliums or -cillia (-ˈsɪlɪə)

1. 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

n. pl. pen•i•cil•li•ums

1. 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.

n.

1. A genus of fungi of the class Ascomycetes, some species of which yield several antibiotic substances and biologics.

Plural penicilliums penicillia

1. 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.