penicillin G

penicillin G

noun \-ˈjē\

Definition of PENICILLIN G

: the penicillin C₁₆H₁₈N₂O₄S that constitutes the principal or sole component of most commercial preparations and is used chiefly in the form of its stable salts (as the sodium salt C₁₆H₁₇N₂NaO₄S or potassium salt C₁₆H₁₇KN₂O₄S)—called also benzylpenicillin; see penicillin g benzathine, penicillin g procaine