| At wt | Atomvægt |
| At-sign | Snegl |
| Atabaque | Atabaque |
| Atacama | Atacamaørkenen |
| Atacama Desert | Atacamaørkenen |
| Atacama Region | Atacamaørkenen |
| Atacameño | Atacamaørkenen |
| Atalanta | Admiral |
| Atari | Regnestok |
| Atari Jaguar | Jaguar |
| ATC | ATC |
| ATC code A | ATC |
| ATC code B | ATC |
| ATC code C | ATC |
| ATC code D | ATC |
| ATC code G | ATC |
| ATC code H | ATC |
| ATC code J | ATC |
| ATC code L | ATC |
| ATC code M | ATC |
| ATC code N | ATC |
| ATC code P | ATC |
| ATC code R | ATC |
| ATC code S | ATC |
| ATC code V | ATC |
| Atefah Sahaaleh | Atefeh Sahaaleh |
| Aten | Aton |
| Aten asteroid | Aten-asteroide |
| Athamas | Athamas |
| Athanasian Creed | Den athanasianske trosbekendelse |
| Atheism | Ateisme |
| atheist | ateist |
| Atheist Alliance International | Atheist Alliance International |
| Athena | Athene |
| Athenaeus | Athenæum |
| Athene | Athen |
| Athene noctua | Kirkeugle |
| Atheneum | Athenæum |
| Athenian | Athen |
| Athenian democracy | Det athenske demokrati |
| Athens | Athen |
| Athens Prefecture | Athen |
| Atheriniformes | Tandkarpe |
| Atheroma | Åreforkalkning |
| athlete | atlet |
| Athletics | Atletik |
| Athlon | Athlon XP |
| Athmosphere | Jordens atmosfære |
| Atholl | Atol |
| Athrotaxis | Athrotaxis |
| Athyriaceae | Fjerbregne-familien |
| Ati | ATI |
| ATI Technologies | ATI |
| Atkins Nutritional Approach | Atkins-kuren |
| Atlanta | Atlanta |
| Atlanta Braves | Atlanta Braves |
| Atlanta Falcons | Atlanta Falcons |
| Atlanta Thrashers | Atlanta Thrashers |
| Atlantean | atlantisk |
| Atlanterhavsveien | Atlanterhavsvejen |
| Atlantic | atlantisk |
| Atlantic Charter | Atlanterhavserklæringen |
| Atlantic City | Atlantic City |
| Atlantic halibut | Hellefisk |
| Atlantic horse mackerel | Hestemakrel |
| Atlantic Northern Right Whale | Nordkaper |
| Atlantic Ocean | Atlanterhavet |
| Atlantic slave trade | Slavehandel |
| Atlantic Spotted Dolphin | Atlantisk plettet delfin |
| Atlantic Wall | Atlantvolden |
| Atlantic White-sided Dolphin | Hvidskæving |
| Atlantis | Atlantis |
| Atlantis II | Atlantis |
| atlas | atlas |
| Atlas Cedar | Atlas-Ceder |
| Atlas Mountains | Atlasbjergene |
| Atlatl | Atlatl |
| Atlántico Department | Atlanterhavet |
| Atlántida | Atlantis |
| Atlético Madrid | Atlético de Madrid |
| Atmel AVR | Atmel AVR |
| Atmosophere | Æter |
| atmosphere | atmosfære |
| atmospheric aerosol | atmosfærisk aerosol |
| atmospheric chemistry | atmosfærisk kemi |
| atmospheric circulation | atmosfærisk cirkulation |
| atmospheric component | bestanddel i atmosfæren |
| atmospheric composition | atmosfærens sammensætning |
| atmospheric correction | atmosfærisk korrektion |
| atmospheric fallout | nedfald |
| atmospheric layering | atmosfærisk lag |
| atmospheric monitoring | overvågning af atmosfæren |
| atmospheric ozone | atmosfærisk ozon |
| atmospheric particulate | atmosfærisk partikel |
| atmospheric physics | atmosfærefysik |
| atmospheric pollution | forurening af atmosfæren |
| atmospheric precipitation | nedbør |
| Atmospheric pressure | Atmosfære |
| atmospheric process | atmosfærisk proces |
| atmospheric science | atmosfærevidenskaber |
| atmospheric structure | atmosfærens struktur |
| Atol Kwajalein | Kwajalein |
| atoll | atol |
| atom | atom |
| Atomic bombings of Hiroshima and Nagasaki | Atombomberne over Hiroshima og Nagasaki |
| Atomic clock | Atomur |
| Atomic energy plant | Atomreaktor |
| Atomic force microscope | Atomic Force Microscope |
| atomic mass | atommasse |
