caduceus /ka-dūˈsi-əs/ (classical myth)

1. The rod of Hermes (Mercury), messenger of the gods, generally represented as a wand surmounted with two wings and entwined by two serpents
2. A symbol resembling this rod, used as an emblem by the medical profession

• asleep
• a sleeveless errand
• ASLEF
• AS level
• ASLIB
• Aslib
• as like as chalk and cheese
• as likely as not
• as long as
• as long as one's arm
• aslope
• -asm
• ASM
• a small fortune
• as many as
• asmear
• Asmoday
• Asmodeus
• asmoulder
• as much
• as much as
• as now
• asocial
• as of
• as of now