ampicillin

[am-puh-sil-in]
noun Pharmacology.
a broad-spectrum semisynthetic penicillin, C 16 H 19 N 3 O 4 S, effective against certain susceptible Gram-positive and Gram-negative bacteria.

Origin:
1965–70; probably am(inobenzyl)p(en)icillin, an alternate chemical name

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
Cite This Source Link To ampicillin
Collins
World English Dictionary
ampicillin (ˌæmpɪˈsɪlɪn)
 
n
a semisynthetic penicillin used to treat various infections

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
Cite This Source
American Heritage
Medical Dictionary

ampicillin am·pi·cil·lin (ām'pĭ-sĭl'ĭn)
n.
A semisynthetic of penicillin effective against gram-negative and gram-positive bacteria and used in treating infections of the intestinal, urinary, and respiratory tracts.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Cite This Source
American Heritage
Science Dictionary
ampicillin   (ām'pĭ-sĭl'ĭn)  Pronunciation Key 
An antibiotic derived from penicillin that has a broad antibacterial spectrum of action. It is effective against gram-negative and gram-positive bacteria and is used primarily to treat gonorrhea and infections of the respiratory, urinary, and intestinal tracts.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
Cite This Source
Encyclopedia Britannica
Encyclopedia

ampicillin

drug used in the treatment of various infections, including otitis media (middle ear infection), sinusitis, and acute bacterial cystitis. Ampicillin (or alpha-aminobenzylpenicillin) is a semisynthetic penicillin, one of the first such antibiotics developed. Similar in action to penicillin G but more effective against gram-negative bacteria, ampicillin is more stable in stomach acids and therefore may be given orally.

Learn more about ampicillin with a free trial on Britannica.com.

Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
Cite This Source
Example sentences
Ampicillin is similar, but requires more doses and has more severe gastrointestinal side effects than amoxicillin.
Copyright © 2014 Dictionary.com, LLC. All rights reserved.
  • Please Login or Sign Up to use the Recent Searches feature