n.
Pronunciation: si- ' tr ī -n ə n
Function: noun
Etymology: New Latin citrinum, specific epithet of Penicillium citrinum
Date: 1931
: a toxic antibiotic C 13 H 14 O 5 that is produced especially by a penicillium ( Penicillium citrinum ) and an aspergillus ( Aspergillus niveus ) and is effective against some gram-positive bacteria