Nouns starting with A

• archaebacterium — Noun – English ～ considered ancient life forms that evolved separately from bacteria and blue-green algae
• archaeobacteria — Noun – English ～ considered ancient life forms that evolved separately from bacteria and blue-green algae
• archaeologist — Noun – English ～ an anthropologist who studies prehistoric people and their culture
• archaeology — Noun – English ～ the branch of anthropology that studies prehistoric people and their cultures
• archaeopteryx — Noun – English ～ extinct primitive toothed bird of the Jurassic period having a long feathered tail and hollow bones; usually considered the most primitive of all birds
• archaeornis — Noun – English ～ extinct primitive toothed bird with a long feathered tail and three free clawed digits on each wing
• Archaeornithes — Noun – English ～ primitive reptile-like fossil birds of the Jurassic or early Cretaceous
• Archaeozoic aeon — Noun – English ～ the time from 3,800 million years to 2,500 million years ago; earth's crust formed; unicellular organisms are earliest forms of life
• Archaeozoic — Noun – English ～ the time from 3,800 million years to 2,500 million years ago; earth's crust formed; unicellular organisms are earliest forms of life
• archaicism — Noun – English ～ the use of an archaic expression
• archaism — Noun – English ～ the use of an archaic expression
• archaist — Noun – English ～ an expert or collector of antiquities
• archaist — Noun – English ～ a person who archaizes
• archangel — Noun – English ～ a biennial cultivated herb; its stems are candied and eaten and its roots are used medicinally
• archangel — Noun – English ～ an angel ranked above the highest rank in the celestial hierarchy
• Angelica Archangelica — Noun – English ～ a biennial cultivated herb; its stems are candied and eaten and its roots are used medicinally
• archbishop — Noun – English ～ a bishop of highest rank
• archbishopric — Noun – English ～ the territorial jurisdiction of an archbishop
• archdeacon — Noun – English ～ (Anglican Church) an ecclesiastical dignitary usually ranking just below a bishop
• archdeaconry — Noun – English ～ the territorial jurisdiction of an archdeacon

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