1. Disciple of Jesus and leader of the Apostles; regarded by Catholics as the vicar of Christ on earth and first Pope
   - Peter, Simon Peter, Saint Peter, Saint Peter the Apostle, St. Peter the Apostle

Type of: Apostle, saint

• achromous
• Achromycin
• achy
• achylia
• achylia gastrica
• acicula
• acicular
• aciculate
• acid
• acid anhydrides
• acid dye
• acid halide
• acid head
• acid hydrogen
• acid precipitation
• acid rain
• acid rock
• acid test
• acid value
• acid-base balance
• acid-base equilibrium
• acid-base indicator
• acid-fast
• acid-forming
• acid-loving