penicillin

Definition of penicillin

pen`i`cil´lin   Pronunciation: pĕn`ĭ`sĭl´lĭn
n.1.(Chem.) Any of a variety of substances having a structure containing a beta-lactam ring fused to a thiirane ring, to which a carboxyl group is attached, but most commonly interpreted as benzyl penicillin. They are notable as powerful antibacterial agents of relatively low toxicity which have found extensive use in medicine for treating bacterial infections. They are categorized as one of the classes of beta-lactam antibiotic. They are produced naturally by some fungi and bacteria, and industrial production processes almost invariably start from some form of the penicillin nucleus produced by fermentation of microorganisms. The fermentation products are then chemically modified to produce derivatives of enhanced potency, safety, or antibacterial spectrum. The first penicillin to see extensive use clinically (during World War II) was penicillin G, also called benzypenicillin, and commonly simply "penicillin".

Related Words

Chloromycetin, Terramycin, actinomycin, amphotericin, bacitracin, carbomycin, chlortetracycline, cloxacillin, dihydrostreptomycin, erythromycin, fradicin, gramicidin, griseofulvin, methicillin, mitomycin, streptomycin, streptothricin, subtilin, tetracycline, tylocin, tyrothricin, vancomycin, viomycin
Word:

Browse

Penetrance
Penetrant
Penetrate
Penetrating
Penetratingly
Penetration
Penetrative
Penetrativeness
Penfish
Penfold
Pengolin
Penguin
Penguinery
Penholder
Penhouse
Penible
Penicil
Penicillamine
Penicillate
Penicilliform
-penicillin-
Penicillinase
Peninsula
Peninsula State
Peninsular
Peninsulate
Penis
Penitence
Penitencer
Penitency
Penitent
Penitential
Penitentially
Penitentiary
Penitentiaryship
Penitently
Penk
Penknife
penlight
Penman
Penmanship
# A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

© 2014 Delaflex, Inc.Dictionary Home | Privacy Policy