Ampicillin

n. form of semisynthetic penicillin

Ampicillin is a beta-lactam antibiotic that has been used extensively to treat bacterial infections since 1961. It is considered part of the aminopenicillin family and is roughly equivalent to amoxicillin in terms of spectrum and level of activity. It can sometimes result in allergic reactions that range in severity from a rash (e.g. patients with mononucleosis) to potentially lethal anaphylaxis.
See more at Wikipedia.org...

Ampicillin /am·pi·cil·lin/ a semisynthetic, acid-resistant, penicillinase-sensitive penicillin used as an antibacterial against many gram-negative [more]Ampicillin - Community and Resources

Noun
1. semisynthetic penicillin (trade names Principen and Polycillin and SK-Ampicillin)
(synonym) Principen, Polycillin, SK-Ampicillin
(hypernym) penicillin
(classification) trade name, brand name, brand, marque

noun
type of penicillin, used as an antibiotic