Columbia Encyclopedia

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negotiable instrument

(Encyclopedia)negotiable instrument, bill of exchange, check, promissory note, or other written contract for payment that may serve as a substitute for money. It is simple in form and easy to transfer. Transfer of ...

percussion instrument

(Encyclopedia)percussion instrument, any instrument that produces musical sound when its surface is struck with an implement (such as a mallet, stick, or disk) or with the hand. Perhaps the most universally familia...

stringed instrument

(Encyclopedia)CE5 stringed instrument, any musical instrument whose tone is produced by vibrating strings. Those whose strings are plucked with the finger or a plectrum include the balalaika, banjo, guitar, harp...

transit instrument

(Encyclopedia)transit instrument or transit, telescope devised to observe stars as they cross the meridian and used for determining time. Its viewing tube swings on a rigid horizontal axis restricting its movements...

transposing instrument

(Encyclopedia)transposing instrument, a musical instrument whose part in a score is written at a different pitch than that actually sounded. Such an instrument is usually referred to by the keynote of its natural s...

reed instrument

(Encyclopedia)reed instrument, in music, an instrument whose sound-producing agent is a thin strip of cane, wood, plastic, or metal that vibrates as air is passed over it. The predecessor of these instruments is th...

weather vane

(Encyclopedia)weather vane or wind vane, instrument used to indicate wind direction. It consists of an asymmetrically shaped object, e.g., an arrow or a rooster, mounted at its center of gravity so it can move free...

Wind River Range

(Encyclopedia)Wind River Range, part of the Rocky Mts., W Wyo., running southeastward c.120 mi (190 km) and constituting part of the Continental Divide. Gannett Peak (13,804 ft/4,207 m) is the highest point in Wyom...

instrument flight regulations

(Encyclopedia)instrument flight regulations: see air navigation. ...

instrument-landing system

(Encyclopedia)CE5 Instrument-landing system (ILS), the most common instrument-landing approach system, uses two beams to guide an airplane. instrument-landing system (ILS), ground-based radio system designed to...