archetypical archevite archi archiannelid archiannelida archibald macleish archibald percival wavell Archibuteo ferrugineus Archibuteo lagopus archidiaconal archidiaconate archidiskidon archidiskidon imperator Archie Archie, MO archiepiscopal archil archilochus archilochus colubris archimandrite archimedes Archimedes screw archimedes' principle archine arching archipallium archipelagic archipelago archippus archite architect architectonic architectonics architectural architectural engineering architectural ornament architectural plan architectural style architecturally architecture architeuthis architrave archival archive archives archivist archlute archly archness archosargus archosargus probatocephalus archosargus rhomboidalis archosaur archosauria archosaurian archosaurian reptile archpriest Archuleta Archuleta County Archuleta County, CO Archuleta, CO archway arcidae arciform arcminute arcnet arco Arco, ID Arco, MN Arcola Arcola, IL Arcola, MO Arcola, MS Arcola, TX arcsec arcsecant arcsecond arcsin arcsine arctan arctangent Arctia phalerata arctic arctic archipelago arctic char arctic circle arctic fox arctic fulmar arctic ground squirrel arctic hare arctic moss arctic mouse-ear arctic ocean Arctic penguin arctic poppy arctic skua Arctic Village Arctic Village, AK arctic willow arctic wolf arctic zone arctictis arctictis bintourong arctiid arctiid moth arctiidae arctium arctium lappa arctium minus arctocebus arctocebus calabarensis arctocephalus arctocephalus philippi Arctomys bobac Arctomys monax Arctomys pruinosus Arctonetta Fischeri arctonyx arctonyx collaris Arctopitheus ai arctostaphylos arctostaphylos alpina arctostaphylos andersonii Arctostaphylos glauca arctostaphylos manzanita Arctostaphylos pungens arctostaphylos tomentosa arctostaphylos uva-ursi Arctostaphylus Uva-ursi Arctotheca calendulaceae arctotis arctotis stoechadifolia arctotis venusta arcturus arcuate arcuate artery arcuate artery of the kidney arcuate vein of the kidney arcus arcus senilis arcus zygomaticus ard arda ardea Ardea alba Ardea candidissima Ardea cinerea Ardea coerulea Ardea comata Ardea egretta Ardea garzetta Ardea herodias ardea herodius Ardea minuta ardea occidentalis Ardea virescens