1. The ordinal number of one hundred eighty in counting order
   - hundred-and-eightieth

See also: ordinal

• amphidiploid
• amphidiploidy
• amphigory
• amphimacer
• amphimixis
• Amphineura
• Amphioxidae
• amphioxus
• amphipod
• Amphipoda
• Amphiprion
• Amphiprion percula
• amphiprostylar
• amphiprostyle
• amphiprotic
• amphisbaena
• Amphisbaenia
• Amphisbaenidae
• amphistylar
• amphitheater
• amphitheatre
• amphitheatric
• amphitheatrical
• Amphitheatrum Flavium
• amphitropous