semisynthetic penicillin

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• penicillin V — vē n a crystalline nonhygroscopic acid that is used in the form of its potassium salt C16H17KN2O5S and has antibacterial action similar to penicillin G and is more resistant to inactivation by gastric acids called also phenoxymethyl penicillin *… …   Medical dictionary

• penicillin — /pen euh sil in/, n. Pharm. any of several antibiotics of low toxicity, produced naturally by molds of the genus Penicillium and also semisynthetically, having a bactericidal action on many susceptible Gram positive or Gram negative cocci and… …   Universalium

• Penicillin — Historically, the most famous of all antibiotics, named for the fungal mould Penicillium notatum from which it is derived. Penicillin acts by destroying the cell wall in those bacteria that are sensitive have been developed (not resistant) to its …   Medical dictionary

• Penicillin — For the Japanese band, see Penicillin (band). Penicillin core structure. The R is the variable group. Penicillin (sometimes abbreviated PCN or pen) is a group of antibiotics derived from Penicillium fungi.[1] They include …   Wikipedia

• penicillin — n. an antibiotic that was derived from the mould Penicillium rubrum and first became available for treating bacterial infections in 1941. Since then, a number of naturally occurring penicillins have been developed to treat a wide variety of… …   The new mediacal dictionary

• isoxazolyl penicillin — any of a group of semisynthetic penicillins, including oxacillin and cloxacillin, which combine resistance to penicillinase with acid stability and activity against gram positive bacteria …   Medical dictionary

• penicillinV — penicillin V n. A semisynthetic penicillin that is stable even in high humidity, resists destruction by gastric juice, and is therefore effective when taken orally. * * * …   Universalium

• methicillin sodium — A semisynthetic penicillin salt for parenteral administration; restriction of its use to infections caused by penicillin G resistant staphylococci is recommended; it is less effective than penicillin G in infections caused by hemolytic… …   Medical dictionary

• amoxicillin — A semisynthetic penicillin antibiotic with an antimicrobial spectrum similar to that of ampicillin. * * * amox·i·cil·lin or Brit amox·y·cil·lin ə .mäk sē sil ən n a semisynthetic penicillin C16H19N3O5S derived from ampicillin see …   Medical dictionary

• cloxacillin — ¦kläksə¦silə̇n noun ( s) Etymology: chlorophenol + isoxazole + penicillin : a semisynthetic oral penicillin C19H17ClN3NaO5S effective especially against staphylococci which secrete penicillinase * * * /klok seuh sil in/, n. Pharm. a semisynthetic …   Useful english dictionary

• ampicillin — An acid stable semisynthetic penicillin derived from 6 aminopenicillanic acid; it has a broader spectrum of antimicrobial action than penicillin G, inhibits the growth of Gram positive and Gram negative bacteria, and is not resist …   Medical dictionary