226. Instruments


See also 264. MEASUREMENT .

accelerometer
an instrument for measuring and recording the rate of acceleration of an aircraft.
algometer
an instrument for measuring a person’s sensitivity to pain produced by pressure. — algometric, algometrical, adj.
altimeter
an instrument for determining altitude above a fixed level by comparison of air pressure readings.
ammeter
an instrument for measuring the amperage of an electrical current.
anemoscope
an instrument for recording the direction of the wind.
astrolabe
a navigational instrument formerly used for taking bearings of the sun and stars. See also 352. REPRESENTATION .
auriscope
an instrument for examining the ear. —auriscopy , n.
ballistic galvanometer
fluxmeter.
barometer
an instrument for measuring atmospheric pressure.
bioinstrumentation
the use of instruments to measure, record, and transmit data on bodily functions.
breathalyzer
drunkometer.
chromoptometer
a device for measuring the degree of a person’s sense of color.
chronometer
a timing device of extreme accuracy, frequently with a device for checking and adjusting its accuracy. —chronometric, chronometrical , adj.
chronoscope
an instrument for accurate measurement of very short periods of time, as the time of trajectory of missiles.
clepsydra
an instrument for measuring time by the controlled flow of water or mercury through a small opening.
cosmolabe
Obsolete, an instrument, like an astrolabe, used for astronomical observations.
cryometer
a thermometer for measuring very low temperatures.
cyclometer
an instrument for counting the revolutions of a wheel that is rolled along a surface and thus the distance traveled.
densimeter
an instrument for measuring the density or specific gravity of a solid or liquid substance.
dioptometer
an instrument for measuring the refractive index of the lens of the eye.
dosimeter
a device, carried or worn by people working near radiation for measuring the amount of radiation to which they are exposed.
drunkometer
a device for measuring the amount of alcohol in the blood-stream, usually from the breath. Also called breathalyzer .
erythrocytometer
a device for measuring the count of red blood cells in the blood.
eudiometer
an instrument for measuring the amount of oxygen in the air and for analyzing gases.
extensometer
an instrument for measuring minute degrees of contraction, expansion, or deformation, as of metals.
fluorometer
an instrument for measuring the emission of radiation in the form of visible light and identifying the substance that is its source. — fluorometric , adj.
fluoroscope
a device fitted with a screen that fluoresces when exposed to radiation.
fluxmeter
an instrument for measuring magnetic flux; a ballistic galvanometer.
galactometer
lactometer.
galvanometer
an instrument for measuring the strength and direction of an electric current. —galvanometric, galvanometrical , adj.
galvanoscope
an instrument for detecting the presence of an electric current and determining its direction.
glossograph
an instrument for recording the movements of the tongue during speech.
goniometer
an instrument for measuring angles, especially those of solid bodies.
gramophone
an instrument for reproducing sound from records; phonograph.
graphophone
an instrument for reproducing sound from wax records.
graphoscope
an optical device for magnifying pictures, as engravings, photographs, etc.
heliometer
an instrument originally designed for measuring the sun’s diameter, now used for measuring the angular distance between stars.
horometer
an instrument for measuring time.
hydrometer
an instrument for measuring the specific gravity of a liquid.
hygrometer
an instrument for measuring the amount of moisture in the air.
hypsometer
an instrument for measuring altitude by the relationship between atmospheric pressure and the boiling point of a liquid.
indigometer
an instrument used for determining the strength of an indigo solution.
instrumentation
1. the technology of designing and constructing instruments, especially for use in science and industry.
2. a particular system of instruments in a special context.
3. instruments collectively.
interferometer
an instrument that measures wavelengths, minute distances, or the refractivity of lenses by comparison of interference patterns generated by the splitting and reuniting of a beam of light passed through a lens. —interferometry , n.
jovilabe
an instrument used for determining the positions of the satellites that surround the planet Jupiter.
kaleidophon, kaleidophone
an instrument for the visual representation of sound waves.
kaleidoscope
an optical device composed of bits of colored glass and several reflecting surfaces that presents to the viewer symmetrical patterns when shaken or rotated. —kaleidoscopic , adj.
kinetoscope
an instrument for illustrating different combinations of kinematic curves. See also 265. MEDIA .
konimeter
an instrument for measuring impurities in the air. —konimetric , adj.
lactometer
an instrument for measuring the richness of milk from its specific gravity. Also called galactometer .
lactoscope
an instrument for measuring the opacity of milk so that its cream content can be determined.
laryngoscope
an apparatus for examining the larynx. —Iaryngoscopist , n. —laryngoscopic , adj.
leucoscope
an instrument for testing the eyes to determine the ability to distinguish variations in color or intensity of light.
madisterium
a surgical instrument for pulling out hairs.
manometer
1. an instrument for measuring the pressure of gases or vapors.
2. an instrument for measuring blood pressure. Also called sphygmomanometer. —manometric . adj.
megameter
1. an instrument for determining longitude by observation of the stars.
2. Rare. an instrument for measuring large objects.
melanoscope
an optical device composed of red and violet glass that transmits red light only, used for distinguishing red in varicolored flames.
metrograph
a device for recording the speed of locomotives and the time, place, and length of all their stops.
metronome
an instrument for marking time in music that produces regular ticking sounds for a variety of rhythmic settings. —metronomic, metronomical , adj.
mutoscope
an instrument for recording and reproducing the illusion of motion by means of a series of photographs.
myrioscope
a form of kaleidoscope, especially one that is used when exhibiting carpets.
nauropometer
Rare. an apparatus for measuring the inclination of a heeling or listing ship.
Nilometer
an instrument used for measuring the increase in the level of the River Nile during its flood period, consisting of a water chamber containing a graduated pillar. Also called Niloscope.
noctograph
an apparatus or register for recording timely and proper observance by watchmen of their patrols.
odometer
an instrument for recording elapsed distance.
ohmmeter
an instrument for measuring electrical resistance in ohms.
ondograph
an instrument for recording oscillatory variations, as those in alternating currents. —ondogram , n.
ondometer
an instrument for measuring the wavelengths of radio waves.
oometer
a device for measuring eggs.
optotechnics
the technology of optical instruments and apparatus.
osmometer
an instrument for measuring osmotic pressure. —osmometric , adj.
pachymeter
an instrument for measuring the thickness of things.
paralellometer
an instrument for ascertaining the accuracy of parallel surfaces, as of a sheet of plate glass.
pedometer
a device for measuring distance traversed on foot.
penetrometer
an instrument for measuring the degree of penetrability of a solid.
phantasmascope, phantascope
an optical device that enables the viewer to converge the optical axes of the eyes and experience some of the phenomena of binocular vision.
photodrome
1. an apparatus that regulates light flashes so that a rotating object appears to be stationary or moving in a direction opposite to its actual motion.
2. an apparatus for producing unusual optical effects by flashing light upon disks bearing various figures, patterns, etc.
photometer
an instrument for measuring various characteristics of light, as intensity, distribution, flux, color, etc.
piezometer
one of various devices for measuring the pressure of a fluid or the degree of compressibility of a substance when subjected to such pressure. —piezometric , adj.
planometer
a device for measuring the flatness of a machined surface. Also called surface plate.
plastometer
an instrument for measuring the plasticity of a material. —plastometric , adj.
pneumatograph
an instrument for recording the movements of the chest during respiration.
praxinoscope
an instrument that represents the effect of moving images on a screen.
pulsimeter, pulsometer
an instrument for measuring the rate of the pulse.
pycnometer
a container for measuring the density of liquids or solids.
pyrheliometer
an instrument for measuring the intensity of the sun’s radiation. — pyrheliometric , adj.
pyrometer
an instrument for detecting and measuring high temperatures. — pyrometric, pyrometry , adj.
pyrophotometer
a type of pyrometer that measures temperature optically or photometrically.
quadrant
an instrument for measuring angular elevation, used in astronomy, navigation, surveying, etc., similar in principle to the sextant. —quadrantal, ad].
radiometer
an instrument for measuring the intensity of radiant energy, composed of vanes which rotate at speeds proportionate to the intensity of the energy source. —radiometric , adj.
seismograph
an instrument for measuring and recording the intensity of earth tremors.
sextant
a navigational instrument for determining latitude and longitude by measuring the angles of heavenly bodies in relation to the horizon or other heavenly bodies.
snooperscope
a device using infrared radiation and a fluoroscope to enable an observer to identify objects in the dark.
spectrobolometer
an instrument combining a bolometer and a spectroscope, used for determining the distribution of energy in a spectrum. —spectrobolometric , adj.
spectroscope
a device for producing and observing a spectrum of light or other radiation. —spectroscopy , n.
speedometer
an instrument that records the speed of a vehicle in motion for the driver of the vehicle.
sphygmograph
an instrument for measuring and recording various characteristics of the arterial pulse.
sphygmomanometer
manometer, def. 2.
stadiometer
1. an instrument with a toothed wheel for measuring curves, broken lines, etc.
2 . an obsolete form of tachymeter.
sympalmograph
an apparatus for illustrating in graphic form the composition of two simple harmonic motions at right angles.
sympiesometer, sympiezometer
1. an instrument for measuring the pressure exerted by currents of water. See also 414. WATER .
2. an instrument for measuring the weight of the atmosphere by the compression of a column of gas. See also ATMOSPHERE .
tachistoscope
an instrument for exposing pictures and other visual stimuli for very brief periods, used in psychological testing and various teaching methods.
tachometer
an instrument for measuring revolutions per minute, especially of an internal combustion engine.
tachymeter
a surveying instrument for measuring distance, height, elevation, etc.
tachyscope
a type of kinescope that presents the effect of moving pictures by use of a rotating glass plate with images attached to it.
telemeter
1. an instrument for measuring the distance of objects from the observer, as the range finder in artillery.
2. an electronic device for taking readings from other distant instruments.
theodolite
a surveying instrument for measuring vertical and horizontal angles. —theodolitic , adj.
thermometer
an instrument for measuring temperature.
turbidimeter
an instrument for measuring the turbidity of water or other fluids. —turbidimetric , adj.
udomograph
a self-registering rain gauge.
urinometer
an instrument for determining the specific gravity of urine.
vacuometer
an instrument used for comparing barometers at varying pressures against a Standard barometer.
velocimeter
a device for measuring speed or velocity, especially that of projectiles.
viameter
an early form of odometer, for measuring the distance traveled by a carriage. Also called viatometer.
viatometer
viameter.
vibroscope
an apparatus for the observation and recording of vibrations.
videophone
an apparatus combining a telephone with a television transmitter and receiver so that the parties speaking to one another can also see one another.
voltammeter
an instrument for measuring the voltage and amperage of an electrical current.
voltmeter
an instrument for measuring the voltage of an electrical current.
volumenometer
an instrument for measuring the volume of a solid body and its specific gravity by the quantity of a gas or liquid it displaces.
volumescope
a graduated glass tube for showing the changes in volume in certain compounds as a result of chemical action.
volumeter
an instrument for measuring the volumes of gases and liquids and of solids by the amount of gas or liquid they displace. —volumetric, volumetrical , adj.

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