1. The internal mechanism of a device
   - works 
2. A mine or quarry that is being or has been worked
   - working

Type of: excavation, mechanism

• ambulatory plague
• ambuscade
• ambush
• ambusher
• Ambystoma
• Ambystoma maculatum
• Ambystoma mexicanum
• Ambystoma talpoideum
• Ambystoma tigrinum
• Ambystomatidae
• ambystomid
• ambystomid salamander
• AMD
• ameba
• ameban
• amebiasis
• amebic
• amebic dysentery
• amebiosis
• ameboid
• amebous
• Amedeo Avogadro
• Amedeo Modigliano
• ameer
• Ameiuridae