1. 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 [US], Archean eon, Archean aeon, Archeozoic, Archaeozoic, Archeozoic eon, Archaean

Type of: aeon, eon

Part of: Precambrian, Precambrian aeon, Precambrian eon, Precambrian period

• parsley-leaved thorn
• parsnip
• parson
• parson's nose
• parsonage
• Parsons
• Parsons table
• part
• part music
• part name
• part of speech
• part to whole relation
• part with
• part-of-speech tagger
• part-owner
• part-singing
• part-timer
• partake
• partake in
• partaker
• parted
• parted leaf
• parterre
• Parthenium
• Parthenium argentatum