AU

1. African Union
2. Ångström unit (also ÅU, now usu Å)
3. Astronomical unit

Au (chem)

Gold

• castock
• castocks
• cast off
• cast-off
• cast-offs
• cast on
• cast one's bread upon the waters
• cast one's mind back
• cast on someone's tail
• castor
• Castor
• castor action
• castor bean
• castor beans
• castoreum
• castoreums
• castories
• castor oil
• castor-oil plant
• castors
• castor sugar
• castory
• cast out
• castral
• castrametation