arch
— Noun
– English
～ a curved shape in the vertical plane that spans an opening
abutment arch
— Noun
– English
～ an arch supported by an abutment
archaebacteria
— Noun
– English
～ considered ancient life forms that evolved separately from bacteria and blue-green algae
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