azoic

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a·zo·ic

 (ā-zō′ĭk)
adj.
Of or relating to geologic periods that precede the appearance of life.

azoic

(əˈzəʊɪk; eɪ-)
adj
(Geological Science) without life; characteristic of the ages that have left no evidence of life in the form of organic remains
[C19: from Greek azōos lifeless; see azo-]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Adj.1.azoic - before the appearance of life; "azoic rocks contain not organic remains"
geology - a science that deals with the history of the earth as recorded in rocks
early - at or near the beginning of a period of time or course of events or before the usual or expected time; "early morning"; "an early warning"; "early diagnosis"; "an early death"; "took early retirement"; "an early spring"; "early varieties of peas and tomatoes mature before most standard varieties"
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References in periodicals archive ?
Azo dyes are synthetic dyestuffs which contain the azoic group in their chemical structure and are commonly used in textiles.
No significant differences in terms of density, diversity and nematode community composition were found between the azoic and the Scolelepis treatment, in contrast to the findings obtained for a temperate, macrotidal sandy beach (Maria et al.
The lack of light, the extremely high pressure even at moderate depths (hydrostatic pressure increases by 1 atmosphere with every 33 ft [10 m] depth) and the predictable lack of food due to the absence of primary producers, led the English naturalist Edward Forbes to formulate the azoic theory at the middle of the last century.