• WordNet 3.6
    • n pegmatite a form of igneous rock consisting of extremely coarse granite resulting from the crystallization of magma rich in rare elements
    • ***
Webster's Revised Unabridged Dictionary
    • n Pegmatite (Min) Graphic granite. See under Granite.
    • ***
Century Dictionary and Cyclopedia
    • n pegmatite Coarsely crystallized granite. Also called granitel, granitelle.
    • ***
Chambers's Twentieth Century Dictionary
    • n Pegmatite peg′ma-tīt coarsely crystallised granite
    • ***


Webster's Revised Unabridged Dictionary
From Gr. something fastened together, in allusion to the quartz and feldspar in graphic granite: cf. F. pegmatite,. See Pegm


In literature:

Pebbles and blocks of Pegmatite covered the bed of the creek.
"Journal of an Overland Expedition in Australia" by Ludwig Leichhardt
Des terrains de pegmatite, et de serpentine.
"Narrative of a Survey of the Intertropical and Western Coasts of Australia] [Volume 2 of 2]" by Phillip Parker King
They consist chiefly of granulitic quartzose schists and felspathic gneisses, permeated in places by strings and veins of pegmatite.
"Encyclopaedia Britannica, 11th Edition, Volume 4, Part 4" by Various
Pegmatites are closely related to igneous after-effects, discussed under the next heading.
"The Economic Aspect of Geology" by C. K. Leith
Chrysoberyl is known as a constituent of certain kinds of granite, pegmatite and gneiss.
"Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 3" by Various
Mossite is from a pegmatite vein near Moss in Norway, and tapiolite is from Finland.
"Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 6" by Various
Connected with the borolanite there are other types of nepheline-syenite and pegmatite.
"Encyclopaedia Britannica, 11th Edition, Volume 4, Slice 3" by Various
The granite, which is intruded through the Eocene beds, is associated with a pegmatite containing tourmaline and cassiterite.
"Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 2" by Various
Emerald has been worked in a vein of pegmatite, piercing slaty rocks, near Emmaville, in New South Wales.
"Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 3" by Various