omphaciticadj.
/ˌɒmfəˈsɪtɪk/, U.S. /ˌɑmfəˈsɪdɪk/ Mineralogy.
Containing or of the nature of omphacite.
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the world > the earth > minerals > types of mineral > silicates > inosilicates single chain > [adjective] > varieties
augitic1820
hypersthenic1838
pigeonitic1931
omphacitic1963
jadeitic1965
1963 Amer. Mineralogist 48 1090 The eclogite–granulite–amphibolite nodule group is characterised by pyrope–almandine, omphacitic clinopyroxene, [etc.].
1989 Nature 2 Mar. 60/2 The graphite pyroxenite layers comprise orange pyrope almandine garnet and omphacitic pyroxene porphyroclasts.
1993 Science 30 Apr. 664/3 The starting composition..consisted of mid-ocean ridge basalt..with seeds of garnet, omphacitic pyroxene, epidote, [etc.].
This is a new entry (OED Third Edition, March 2004; most recently modified version published online March 2022).
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adj.1963- well staircase
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