1. Eluding diagnosis
   "undiagnosed disease"

See also: unknown

• apsidal
• apsis
• Apsu
• apt
• Aptenodytes
• Aptenodytes forsteri
• Aptenodytes patagonica
• apteral
• apterous
• Apterygidae
• Apterygiformes
• apteryx
• aptitude
• aptitudinal
• aptly
• aptness
• Apulia
• Apus
• Apus apus
• apyretic tetanus
• Aqaba
• aqua
• aqua fortis
• aqua regia
• aqua vitae