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A crystalline rock consisting of quarts and mica, common in the tin regions of Cornwall and Saxony.

A hard, coarse-grained siliceous sandstone; as, millstone grit; -- called also gritrock and gritstone. The name is also applied to a finer sharp-grained sandstone; as, grindstone grit.

r (Zoöl.), a large and ferocious bear (Ursus horribilis) of Western North America and the Rocky Mountains. It is remarkable for the great length of its claws.

Artificial and ornamental rockwork in imitation of a grotto. Cowper.

interment in a churchyard. -- Ground mass (Geol.), the fine-grained or glassy base of a rock, in which distinct crystals of its constituents are embedded. -- Ground parrakeet (Zoöl.), one of several Australian parrakeets, of the genera Callipsittacus and Geopsittacus, which live mainly upon the ground. -- Ground pe…

In California, the name is often applied to the rockfishes. [Written also groper, gruper, and trooper.]

A loose, earthy deposit from water, found in the cavities or clefts of rocks, mostly white, but sometimes red or yellow, from a mixture of clay or ocher. P. Cleaveland.

ng indigo. -- Gum cistus, a plant of the genus Cistus (Cistus ladaniferus), a species of rock rose.-- Gum dragon. See Tragacanth. -- Gum elastic, Elastic gum. See Caoutchouc. -- Gum elemi. See Elemi. -- Gum juniper. See Sandarac. -- Gum kino. See under Kino. -- Gum lac. See Lac. -- Gum Ladanum, a fragrant gum yi…

noides; esp., M. gunnellus of Europe and America; -- called also gunnel fish, butterfish, rock eel.

y, as a fluid; to rush forth as a fluid from confinement; to flow copiously. He smote the rock that the waters gushed out. Ps ixxviii 20. A sea of blood gushed from the gaping wound. Spenser.

usually pupate in July and the moth appears in August. The eggs are laid on tree trunks, rocks, etc., and hatch in the spring.

A place of safety; a shelter; an asylum. Shak. The haven, or the rock of love. Waller.

Steep; precipitous. [Poetic] Like a tower upon a headlong rock. Byron.

sil coral of the genus Heliolites, having twelve-rayed cells. It is found in the Silurian rocks.

hence, to form laboriously; -- often with out; as, to hew out a sepulcher. Look unto the rock whence ye are hewn. Is. li. 1. Rather polishing old works than hewing out new. Pope.

er valve, with a flattish upper valve or lid. Hippurites are found only in the Cretaceous rocks.

Completely crystalline; -- said of a rock like granite, all the constituents of which are crystalline.

d as a general term to include the whole species. Hornblende schist (Geol.), a hornblende rock of schistose structure.

A mass of earthy matter, or rock of the same character as the wall rock, occurring in the course of a vein, as of coal or ore; hence, to take horse -- said of a vein -- is to divide into branches for a distance.

Of or pertaining to certain non-fossiliferous rocks on the borders of Lake Huron, which are supposed to correspond in time to the latter part of the Archæan age.