1. Exceptionally little; extraordinarily small.
2. One millionth part of a specified unit.

One millionth of an ampere.

Personal computer operated with a microprocessor.

U-shaped frame with a spindle with 40 threads per inch, which is able to measure, with precision up to the nearest 0.001 of an inch. Each time the spindle revolves, it moves it 1/40 (.025) of an inch. The thimble, which encloses the spindle, has 25 equally spaced graduations, around it. When the thimble revolves 1/25 of a revolution, the spindle moves 1/1000 of an inch.

Structure of a material or cell, as seen through a microscope, such as the crystalline structure of metal.

Any fungus that attacks various plants or appears on a material when exposed to dampness, which results in a thin, furry, whitish discoloration.

Steel used to produce structural beams and brackets, nails, etc. due to its low carbon content and lack of special alloying elements.

Chemicals which are poisons, added to coatings such as paint, so that it retards the growth of mildew by killing it on contact.

Linear measurement equal to 6,080 feet, which is used to denote international sea and air distances.

Linear measurement equal to 1,760 yards or 5,280 feet, which is the common measurement of U.S. linear surface.

1. A significant or important event.
2. Pillar set up to denote the distance in miles to or from a certain place.

1. One tenth of a cent. Used in expressing tax rates on a per-dollar basis of assessed valuation.
2. A building with machinery for manufacturing or processing something.
3. To grind, work, process or shape a material.

File, formerly used for sharpening lumber mill saw teeth, which can be used to smooth, shape and sharpen metal.

Shiny spots created on wood by the action of saws, when wood is cut at a mill.

Tax rate applied to property. Each mill represents $1 of tax assessment per $1,000 of assessed property value.

Asbestos cement pipe sections whose ends have been milled, providing a smooth, exterior surface for joints.

Asbestos cement pipe whose surface has been completely milled, providing a smooth, exterior surface so that it can be cut and joined at any length, not needing additional milling.

Prefix that denotes 0.001.

Metric measurement denoting 1/1000 of a gram.

0.039 U.S. inches or 1/1000 of a meter.

Tool available in a variety of shapes, normally with hardened steel or carbide-tipped cutting wheels, used to shape materials such as gear wheel or to make cuts. A milling machine keeps the work in the exact spot needed for the rotating cutters to work accurately.

Machine, which combines a holding and moving apparatus for material as well as the cutters to accurately shape it.

Moldings, jambs, etc which are formed into their finished shapes by removal of excess material.