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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.

Relating to, or derived from, Julius Cæsar. Julian calendar, the calendar as adjusted by Julius Cæsar, in which the year was made to consist of 365 days, each fourth year having 366 days. -- Julian epoch, the epoch of the commencement of the Julian calendar, or 46 b. c. -- Julian period, a chronological period of 7,9…

Adjustment of type by spacing it so as to make it exactly fill a line, or of a cut so as to hold it in the right place; also, the leads, quads, etc., used for making such adjustment.

To make even or true, as lines of type, by proper spacing; to adjust, as type. See Justification, 4.

An instrument which is turned like a key in fastening or adjusting any mechanism; as, a watch key; a bed key, etc.

An instrument by which to find a horizontal line, or adjust something with reference to a horizontal line.

pump, a lifting pump. -- Lift tenter (Windmills), a governor for regulating the speed by adjusting the sails, or for adjusting the action of grinding machinery according to the speed. -- Lift wall (Canal Lock), the cross wall at the head of the lock.

each the wharves at the place of shipment or delivery. Lighter screw (Mach.), a screw for adjusting the distance between the stones in a grinding mill by raising or lowering the bridgetree.

The proper relative position or adjustment of parts, not as to design or proportion, but with reference to smooth working; as, the engine is in line or out of line or out of line.

A thin piece placed between two parts to hold or adjust them, fill a space, etc., ; a shim.

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.

To compensate; to make good; as, to make up a loss. (f) To adjust, or to arrange for settlement; as, to make up accounts. (g) To dress and paint for a part, as an actor; as, he was well made up. -- To make up a face, to distort the face as an expression of pain or derision. -- To make up one's mind, to reach a mental…

t registers the highest degree of temperature attained in a given time, or since its last adjustment.

r multiples of which anything is estimated and stated; hence, a rule by which anything is adjusted or judged.

, a thermometer for recording the lowest temperature since its last adjustment.

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.

ance of a deceased person a month after death. Strype. -- Calendar months, the months as adjusted in the common or Gregorian calendar; April, June, September, and November, containing 30 days, and the rest 31, except February, which, in common years, has 28, and in leap years 29. -- Lunar month, the period of one rev…

One who gives names to things, or who settles and adjusts the nomenclature of any art or science; also, a list or vocabulary of technical names.

Not settled or adjusted; not decided or determined; not closed or withdrawn from consideration; as, an open account; an open question; to keep an offer or opportunity open.

To render impervious, as by filling or surrounding with suitable material, or to fit or adjust so as to move without giving passage to air, water, or steam; as, to pack a joint; to pack the piston of a steam engine.