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Adjective: azoic  ey'zow-ik
  1. (geology) before the appearance of life
    "azoic rocks contain no organic remains"

See also: early

Encyclopedia: Azoic

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azimuth
azimuth mark
azimuthal
azine
azithromycin
azo
azo dye
azo group
azo radical
azobenzene
azoic
azoimide
azole
Azolla
Azolla caroliniana
Azollaceae
azonal
azonic
azoospermia
Azores
azotaemia