azoic

1 [uh-zoh-ik, ey-]
adjective Geology.
(formerly) noting or pertaining to the Precambrian Era, especially that part formerly believed to precede the first appearance of life; Archean.
Compare Eozoic.


Origin:
1840–50; < Greek ázō(os) lifeless (see azo-) + -ic

Dictionary.com Unabridged

azoic

2 [a-zoh-ik]
adjective
of, pertaining to, or characteristic of the azo group.

Origin:
azo- + -ic

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
azoic (əˈzəʊɪk, eɪ-)
 
adj
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-]

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

azoic a·zo·ic (ā-zō'ĭk)
adj.
Containing no living things; lacking organic life.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Example sentences
Azoic coupling components react with diazonium salts in the dye bath or on the fibers to form dyes.
The organic-rich muds deposited in the sea were preserved in the anaerobic, azoic conditions that resulted.
Azoic dyes, are insoluble pigments anchored within the fiber by padding with a soluble coupling compound, usually naphthol.
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