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Capable of being adjusted.

A chair with adjustable back, for the sick, to support them while sitting up in bed.

The adjustable socket, or step, of a millstone spindle. Knight.

mpasses. Caliper square, a draughtsman's or mechanic's square, having a graduated bar and adjustable jaw or jaws. Knight. -- Vernier calipers. See Vernier.

An adjustable catch, bent plate, or hook, for holding together two objects or the parts of anything, as the ends of a belt, the covers of a book, etc.

hand, and in which he arranges the type in words and lines. It has one open side, and one adjustable end by means of which the length of the lines, and consequently the width of the page or column, may be determined.

An adjustable gage, with double points for transferring measurements from one timber to another, as the breadth of a mortise to the place where the tenon is to be made. Knight.

ce in machinery acting as a catch or clutch; especially, the carrier of a lathe, also, an adjustable stop to change motion, as in a machine tool.

A costume worn as a disguise at masquerades, consisting of a robe with a hood adjustable at pleasure.

ending; spreading; enlarging. Expanding bit, Expanding drill (Mech.), a bit or drill made adjustable for holes of various sizes; one which can be expanded in diameter while boring. -- Expanding pulley (Mach.), a pulley so made, as in sections, that its diameter can be increased or diminished.

A structure of four bars, adjustable in size, on which cloth, etc., is stretched for quilting, embroidery, etc.

A form of hygrometer having wet and dry bulb thermometers, with an adjustable index showing directly the percentage of moisture in the air, etc.

An adjustable diaphragm, suggesting the iris of the eye in its action, for regulating the aperture of a lens, consisting of a number of thin pieces fastened to a ring. It is used in cameras and microscopes.

yed to a shaft; an internal key seat; -- called also key seat. -- Key wrench (Mach.), an adjustable wrench in which the movable jaw is made fast by a key. -- Power of the keys (Eccl.), the authority claimed by the ministry in some Christian churches to administer the discipline of the church, and to grant or withhold…

gear, consisting of two eccentrics with their rods, giving motion to a slide valve by an adjustable connecting bar, called the link, in such a way that the motion of the engine can be reversed, or the cut-off varied, at will; -- used very generally in locomotives and marine engines.

at an angle of 45º, for striking lines on stuff to be mitered; also, a square with an arm adjustable to any angle. -- Miter wheels, a pair of bevel gears, of equal diameter, adapted for working together, usually with their axes at right angles.

all or many degrees of power; having a great range of power; -- said of an eyepiece made adjustable so as to give a varying magnifying power.

ugh the blanket of the dark. Shak. From her cabined loophole peep. Milton. Peep sight, an adjustable piece, pierced with a small hole to peep through in aiming, attached to a rifle or other firearm near the breech.

An adjustable piece, pierced with a small hole to peep through in aiming, attached to a rifle or other firearm near the breech; -- distinguished from an open sight.

A frame of adjustable boards erected on a post, and having holes through which the head and hands of an offender were thrust so as to be exposed in front of it. Shak.