A light source composed of a metal base, a glass tube filled with an inert gas or a vapor, and base pins to attach to a fixture.

A thin, tightly adhering oxide skin (only a few molecules thick) that forms when steel is tempered at a low temperature, or for a short time, in air or a mildly oxidizing atmosphere. The color, which ranges from straw to blue depending on the thickness of ...

See calorie.

To unfold or unroll a sail. The opposite of furl.

Deposition of a metal or compound on a heated surface by reduction or decomposition of a volatile compound at a temperature below the melting points of the deposit and the base material. The reduction is usually accomplished by a gaseous reducing agent su ...

A facility or piece of equipment that produces electricity.

An investor who believes share prices are going to fall. He therefore sells shares, sometimes.

Sixteenth-century term for a sea distance at which high land could be observed from a ship. Varied between 14 and 22 miles according to average atmospheric conditions in a given area.

Intimate mixture of oil and water, generally of a milky or cloudy appearance. Emulsions may be of two types: oil-in water (where water is the continuous phase) and water-in-oil (where water is the discontinuous phase).

Situated on the side from which the wind blows.

A vessel capable of engaging in drilling operations for the exploration for, or exploitation of, resources beneath the sea-bed, such as liquid or gaseous hydrocarbons, sulfur or salt.

The difference between the actual electrode potential when appreciable electrolysis begins and the reversible electrode potential.

A device for measuring sea-surface waves. It consists of a weighted pole below which a disk is suspended at a depth sufficiently deep for the wave motion associated with deepwater waves to be negligible. The pole will then remain nearly as if anchored to ...

A condition where the particles (dust) becomes embedded in the fabric filter over time and are not removed by the bag cleaning process.

A instrument designed to study small fluctuations of some quantity. The microbarograph is an example of a recording pressure variometer.

Short Range Certificate (radio)

A common type of terrestrial scintillation; shimmering over a hot surface (such as a roadway) on a quiet, cloudless. summer day.

An investment trust which satisfies certain conditions set by the tax authorities and accordingly.

See hydrologic accounting.

Performing a chromate treatment