1. Any igneous rock with crystals embedded in a finer groundmass of minerals
   - porphyry

Type of: igneous rock

• auto
• auto accessory
• auto company
• auto factory
• auto limitation
• auto loan
• auto manufacturer
• auto mechanics
• auto part
• auto race
• auto racing
• auto tire
• auto-changer
• auto-da-fé
• auto-mechanic
• autoantibody
• autobahn
• autobiographer
• autobiographic
• autobiographical
• autobiography
• autobus
• autocatalysis
• autocatalytic
• autocephalous