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

See also: ordinal

• megadeath
• Megaderma
• Megaderma lyra
• Megadermatidae
• Megaera
• megaflop
• megagametophyte
• megahertz
• megahit
• megakaryocyte
• megakaryocytic
• megalith
• megalithic
• megalithic structure
• megalo-
• Megalobatrachus
• Megalobatrachus maximus
• megaloblast
• megaloblastic
• megaloblastic anaemia
• megaloblastic anemia
• megalocardia
• megalocephaly
• megalocyte
• megalohepatia