A fractionating column for removal of pentane and lighter fractions density with temperature. deperm See degauss.

Related Terms

HYDRAULIC CLASSIFIER

A classifier in which particles are sorted by specific gravity in a stream of hydraulic water that rises at a controlled rate; heavier particles gravitate down and are discharged at the bottom, while lighter ones governing device.

LIGHT NILAS

Nilas which is more than 5 centimeters in thickness and somewhat lighter in color than dark nilas

LASH

Lighter aboard ship: A barge carrier designed to act as a shuttle between ports, taking on and discharging barges.

AUTOMATIC LIGHTER of IGNITER

A means for starting ignition of fuel without manual intervention. Usually applied to liquid, gaseous, or pulverized fuel.

PENUMBRA

1. That part of a shadow in which light is partly cut off by an intervening object. The penumbra surrounds the darker UMBRA in which light is completely cut off. 2. The lighter part of a sun spot, surrounding the darker UMBRA.

SHADOW

1. Darkness in a region, caused by an obstruction between the source of light and the region. By extension, the term is applied to similar condition when any form of radiant energy is cut off by an obstruction, as in a radar shadow. The darkest part of a shadow in which light is completely cut off is called the UMBRA; the lighter part surrounding the umbra in which the light is only partly cut off is called the PENUMBRA. 2. A region of diminished rainfall on the lee side of a mountain or mountain range, where the rainfall is noticeably less than on the windward side. Usually called RAIN SHADOW.

UMBRA

1. The darkest part of a shadow in which light is completely cut off by an intervening object. A lighter part surrounding the umbra, in which the light is only partly cut off, is called the PENUMBRA. 2. The darker central portion of a sun spot, surrounded by the lighter PENUMBRA.

VISCOSITY INDEX

The number to indicate the stability (consistency) of the oil viscosity with temperature. The lighter the number the more stable the oil is.

DUCK

1) A cloth, lighter and finer than canvas; used for trousers and boat covers. 2) A rubber duck is a small inflatable vessel.

L.A.S.H.

A lighter aboard ship. Lighters or barges are loaded and transported with such a ship.

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