archduchy
— Noun
– English
～ the domain controlled by an archduke or archduchess
archduke
— Noun
– English
～ a sovereign prince of the former ruling house of Austria
archean
— Adjective
– English
～ of or relating to the earliest known rocks formed during the Precambrian Eon
Archean 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
archean
— 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
arched
— Adjective
– English
～ constructed with or in the form of an arch or arches; "an arched passageway"
arched
— Adjective
– English
～ forming or resembling an arch; "an arched ceiling"
archegonial
— Adjective
– English
～ of or relating to an archegonium
archegoniate
— Adjective
– English
～ of or relating to an archegonium
archegonium
— Noun
– English
～ a female sex organ occurring in mosses, ferns, and most gymnosperms
archenteron
— Noun
– English
～ central cavity of the gastrula; becomes the intestinal or digestive cavity
archeobacteria
— Noun
– English
～ considered ancient life forms that evolved separately from bacteria and blue-green algae
archeologic
— Adjective
– English
～ related to or dealing with or devoted to archaeology; "an archaeological dig"; "a dramatic archaeological discovery"
archeological
— Adjective
– English
～ related to or dealing with or devoted to archaeology; "an archaeological dig"; "a dramatic archaeological discovery"
archeologist
— Noun
– English
～ an anthropologist who studies prehistoric people and their culture
archeology
— Noun
– English
～ the branch of anthropology that studies prehistoric people and their cultures
archeopteryx
— 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
archeozoic
— Adjective
– English
～ of or belonging to earlier of two divisions of the Precambrian era; "archeozoic life forms"
Archeozoic
— 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
archepiscopal
— Adjective
– English
～ of or associated with an archbishop; "an archiepiscopal see"