Aruba
— Noun
– English
～ a popular island resort in the Netherlands Antilles
arugula
— Noun
– English
～ erect European annual often grown as a salad crop to be harvested when young and tender
arui
— Noun
– English
～ wild sheep of northern Africa
Arulo
— Noun
– English
～ an artificial language intended for international use as an auxiliary language
arum
— Noun
– English
～ starch resembling sago that is obtained from cuckoopint root
arum
— Noun
– English
～ any plant of the family Araceae; have small flowers massed on a spadix surrounded by a large spathe
arrow arum
— Noun
– English
～ an aquatic plant of the genus Peltandra; North America
Arundinaria
— Noun
– English
～ North American bamboo
Arundo
— Noun
– English
～ any of several coarse tall perennial grasses of most warm areas: reeds
Aruru
— Noun
– English
～ mother and earth goddess in Gilgamish epic; identified with Sumerian Ki and Ninkhursag
Agaricus arvensis
— Noun
– English
～ coarse edible mushroom with a hollow stem and a broad white cap
Alauda arvensis
— Noun
– English
～ brown-speckled European lark noted for singing while hovering at a great height
Anagallis arvensis
— Noun
– English
～ herb with scarlet or white or purple blossoms that close at approach of rainy weather
Anthemis arvensis
— Noun
– English
～ European white-flowered weed naturalized in North America
Acinos arvensis
— Noun
– English
～ fragrant European mint having clusters of small violet-and-white flowers; naturalized especially in eastern North America
Arvicola
— Noun
– English
～ in some classifications considered synonymous with Microtus