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A long, thin ice crystal whose cross-section is typically hexagonal. The expression ICE NEEDLE should not be confused with NEEDLE ICE

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1. An instrument that measures the penetrating power of a beam of xrays or other penetrating radiation. 2. An instrument used to determine the consistency of a material by measurement of the depth to which a standard needle penetrates into it under standard conditions.


The consistency of greases, waxes, petrolatum, and asphalt or other bituminous materials expressed as the distance that a standard needle penetrates the sample under specified American Society for Testing and Materials test.


A blow-molding technique in which air is injected into the plastic article through a hollow needle inserted in the parison.


1. A device made of steel pointed at one end with a hole at the other; used for sewing. 2. A device made of steel with a hook at one end; used for knitting. 3. A piece of copper or brass about 1/2 inch (13 millimeters) in diameter and 3 or 4 feet (90 or 120 centimeters) long, pointed at one end, thrust into a charge of blasting powder in a borehole and then withdrawn, leaving a hole for the priming, fuse, or squib. Also known as pricker. 4. A thin pointed indicator on an instrument dial.


A sensitive dip needle consisting of a freely rotating magnetic needle about a horizontal axis and a nonmagnetic bar with a counterweight at the end which is attached to the pivot point of the needle.


Fluctuation about a mid-point due to instability, as oscillations of the needle of an instrument about the zero point.


A dip needle with a sliding weight that can be moved along one of its arms to balance magnetic force, used to determine the correct position of a heeling magnet.


A rolling type of bearing containing rolling elements that are relatively long compared to their diameter.


The swinging of the needle on the direction indicator of an automatic direction finder throug


A compass depending for its directive force upon the attraction of the horizontal component of the earth’s magnetic field for a magnetized needle or sensing element free to turn in a horizon- tal direction.

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