cephalothin
noun
ceph·a·lo·thin ˈse-fə-lə-thən 
-ˌthin
: a semisynthetic broad-spectrum antibiotic derived from cephalosporin and used in the form of its sodium salt C16H15N2NaO6S2
Word History
Etymology
cephalosporin + thi- + -in entry 1
First Known Use
1962, in the meaning defined above
Medical Definition
cephalothin
noun
ceph·a·lo·thin ˈsef-ə-lə-(ˌ)thin
: a semisynthetic broad-spectrum antibiotic C16H15N2NaO6S2 that is an analog of a cephalosporin and is effective against penicillin-resistant staphylococci