Medical Definition of Penicillin
Most staphylococci now are resistant to penicillin. Today, manyderivatives of penicillin are available which act on more types of bacteria than penicillin itself.
The name "penicillium" was taken from the Latin "penicillum" meaning "a painter's brush" because the fronds of the fungus were thought to look like a painter's brush.
For information about the pharmacology of penicillin, see Penicillin V, See also: Penicillin history.
Last Editorial Review: 5/13/2016
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