pegmatiticadj.
/ˌpɛɡməˈtɪtɪk/, U.S. /ˌpɛɡməˈtɪdɪk/ Geology.
Resembling, consisting of, or having the structure of pegmatite.
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the world > the earth > structure of the earth > constituent materials > rock > igneous rock > [adjective] > plutonic > granite > varieties of
pegmatitic1878
pegmatoid1889
1878 G. W. Hawes in C. H. Hitchcock Geol. New Hampsh. iv. ii. 201 The pegmatitic character of a rock he regards as evidence of the simultaneous crystallization of quartz and feldspar.
1896 Nat. Sci. Aug. 86 The pegmatitic structure of so many igneous veins.
1934 Geogr. Rev. 24 212 The main mass is cut by small pegmatitic dikes.
1993 Jrnl. Petrol. 34 656 Independent leucogranite rocks commonly range from fine to very coarse grained, and have aplitic, equigranular, porphyritic, seriate, and pegmatitic textures.
This entry has been updated (OED Third Edition, September 2005; most recently modified version published online March 2022).
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