Azoic dye
any of a group of brilliant, long-lasting azo dyes, formed on the fiber by coupling diazotized materials, used chiefly for printing on cotton.
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- Azoic
(formerly) noting or pertaining to the precambrian era, especially that part formerly believed to precede the first appearance of life; archean. of, relating to, or characteristic of the azo group. historical examples there are traces of periods of superabundant ice and snow, of “glacial ages,” that is, even in the azoic period. a short history […]
- Azoimide
hydrazoic acid. historical examples the solution is then acidified and distilled, when azoimide p-sses over. encyclopaedia britannica, 11th edition, volume 3, part 1, slice 1 various
- Azole
any of a group of five-membered heterocyclic compounds containing one or more nitrogen atoms in the ring, the number of nitrogen atoms present being indicated by a prefix, as in diazole. historical examples the latter, known as ethylene-selenourea, may be cl-ssified also in the azole group as 2-iminotetrahydroselenazole (v). synthesis of 2-methyl-4-selenoquinazolone, 2-phenylbenzoselenazole, and its […]
- Azonal
not divided into zones. (of soil) so young that horizons have not yet developed.
- Azonal soil
noun soil that has a profile determined predominantly by factors other than local climate and vegetation. azonal soils include some mountain, alluvial, marine, glacial, windblown, and volcanic soils compare intrazonal soil, zonal soil