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ious purposes, as around a bolt or screw to form a seat for the head or nut, or around a wagon axle to prevent endwise motion of the hub of the wheel and relieve friction, or in a joint to form a packing, etc.

for weighing; especially, platform scales arranged for weighing heavy bodies, as loaded wagons.

rting and conveying vehicles, in machinery, and for various purposes; as, the wheel of a wagon, of a locomotive, of a mill, of a watch, etc. The gasping charioteer beneath the wheel Of his own car. Dryden.

A man whose occupation is to make or repair wheels and wheeled vehicles, as carts, wagons, and the like.

A fabulous two-legged, winged creature, like a cockatrice, but having the head of a dragon, and without spurs. [Written also wyvern.] The jargon of heraldry, its griffins, its mold warps, its wiverns, and its dragons. Sir W. Scott.

confine the wheels on the axles, or for turning the other nuts or bolts of a carriage or wagon. -- Monkey wrench. See under Monkey. -- Wrench hammer, a wrench with the end shaped so as to admit of being used as a hammer.

To twist or contort the body; to be distorted; as, to writhe with agony. Also used figuratively. After every attempt, he felt that he had failed, and writhed with shame and vexation. Macaulay.

Native lead molybdate occurring in tetragonal crystals, usually tabular, and of a bright orange-yellow to red, gray, or brown color; -- also called yellow lead ore.

A native phosphate of yttrium occurring in yellowish-brown tetragonal crystals.

To cry out, or shriek, with a hideous noise; to cry or scream as with agony or horror. They yelleden as feendes doon in helle. Chaucer. Nor the night raven, that still deadly yells. Spenser. Infernal ghosts and hellish furies round Environed thee; some howled, some yelled. Milton.

fly of the genus Chloroperla; -- so called by anglers. -- Yellow sculpin (Zoöl.), the dragonet. -- Yellow snake (Zoöl.), a West Indian boa (Chilobothrus inornatus) common in Jamaica. It becomes from eight to ten long. The body is yellowish or yellowish green, mixed with black, and anteriorly with black lines. -- Ye…

A mineral occurring in tetragonal crystals, usually of a brown or gray color. It consists of silica and zirconia. A red variety, used as a gem, is called hyacinth. Colorless, pale-yellow or smoky- brown varieties from Ceylon are called jargon. Zircon syenite, a coarse-grained syenite containing zircon crystals and ofte…

A double eight-sided pyramid, a form common with tetragonal crystals; -- so called because this form often occurs in crystals of zircon.