archipelagic
- a relating to or part of an archipelago
an archipelagic war
archean
- n the time from 3,800 million years to 2,500 million years ago; earth's crust formed; unicellular organisms are earliest forms of life
- s of or relating to the earliest known rocks formed during the Precambrian Eon
arched
- v form an arch or curve
- a constructed with or in the form of an arch or arches
an arched passageway - s forming or resembling an arch
an arched ceiling
archeological
- a related to or dealing with or devoted to archaeology
archeozoic
- n the time from 3,800 million years to 2,500 million years ago; earth's crust formed; unicellular organisms are earliest forms of life
- s of or belonging to earlier of two divisions of the Precambrian era
archeozoic life forms