1. The penicillin that constitutes the principal component of many commercial antibiotics
   - benzylpenicillin

Type of: penicillin

• Isaac Hull
• Isaac M. Singer
• Isaac Mayer Wise
• Isaac Merrit Singer
• Isaac Newton
• Isaac Stern
• Isaac Watts
• Isabella
• Isabella I
• Isabella Stewart Gardner
• Isabella the Catholic
• Isadora Duncan
• Isaiah
• Isak Dinesen
• Isamu Noguchi
• isarithm
• Isatis
• Isatis tinctoria
• ISBN
• ischaemia
• ischaemic
• ischaemic stroke
• ischemia
• ischemic
• ischemic anoxia