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• accelerometer go
  an instrument for measuring the acceleration of aircraft or rockets
  
• actinometer go
  an instrument for measuring the intensity of electromagnetic radiation (usually by the photochemical effect)
  
• algometer go
  device for measuring pain caused by pressure
  
• altazimuth go
  an instrument that measures the altitude and azimuth of celestial bodies
  
• altimeter go
  an instrument that measures the height above ground
  
• atmometer, evaporometer go
  an instrument that measures rate of evaporation of water
  
• audiometer, sonometer go
  an instrument used to measure the sensitivity of hearing
  
• barometer go
  an instrument that measures atmospheric pressure
  
• bathymeter, bathometer go
  an instrument that measures the depth of water
  
• bolometer go
  an instrument that measures heat radiation
  
• burette, buret go
  measuring instrument consisting of a graduated glass tube with a tap at the bottom
  
• caliper, calliper go
  an instrument for measuring the distance between two points (often used in the plural)
  
• calorimeter go
  a measuring instrument that determines quantities of heat
  
• chronoscope go
  an instrument for accurate measurements of small intervals of time
  
• colorimeter, tintometer go
  a measuring instrument used in colorimetric analysis to determine the quantity of a substance from the color it yields with specific reagents
  
• counter tube go
  a measuring instrument for counting individual ionizing events
  
• craniometer go
  an instrument for measuring skull sizes
  
• cryoscope go
  a measuring instrument for measuring freezing and melting points
  
• declinometer, transit declinometer go
  an instrument for measuring magnetic declination
  
• densimeter, densitometer go
  a measuring instrument for determining density or specific gravity
  
• densitometer go
  a measuring instrument for determining optical or photographic density
  
• dosemeter, dosimeter go
  a measuring instrument for measuring doses of ionizing radiation (X-rays or radioactivity)
  
• dynamometer, ergometer go
  measuring instrument designed to measure power
  
• electrodynamometer go
  measuring instrument that uses the interaction of the magnetic fields of two coils to measure current or voltage or power
  
• electroscope go
  measuring instrument that detects electric charge
  
• eudiometer go
  measuring instrument consisting of a graduated glass tube for measuring volume changes in chemical reactions between gases
  
• gauge, gage go
  a measuring instrument for measuring and indicating a quantity such as the thickness of wire or the amount of rain etc.
  
• graduate go
  a measuring instrument for measuring fluid volume
  
• gravimeter, gravity meter go
  a measuring instrument for measuring variations in the gravitational field of the earth
  
• heliometer go
  an instrument used to measure the angular separation of two stars that are too far apart to be included in the field of view of an ordinary telescope
  
• hematocrit, haematocrit go
  a measuring instrument to determine (usually by centrifugation) the relative amounts of corpuscles and plasma in the blood
  
• gravimeter, hydrometer go
  a measuring instrument for determining the specific gravity of a liquid or solid
  
• hygrometer go
  measuring instrument for measuring the relative humidity of the atmosphere
  
• inclinometer, dip circle go
  a measuring instrument for measuring the angle of magnetic dip (as from an airplane)
  
• integrator, planimeter go
  a measuring instrument for measuring the area of an irregular plane figure
  
• interferometer go
  any measuring instrument that uses interference patterns to make accurate measurements of waves
  
• ionization chamber, ionization tube go
  a measuring instrument that measures the amount of ionizing radiation
  
• katharometer go
  measures thermal conductivity
  
• Kundt's tube go
  a measuring instrument used to measure the speed of sound
  
• lidar go
  a measuring system that detects and locates objects on the same principle as radar but uses light from a laser
  
• log go
  measuring instrument that consists of a float that trails from a ship by a knotted line in order to measure the ship's speed through the water
  
• measure, measuring stick, measuring rod go
  measuring instrument having a sequence of marks at regular intervals
  
• meter go
  any of various measuring instruments for measuring a quantity
  
• nephoscope go
  a measuring instrument that uses a grid for measuring the altitude, direction, and velocity of movement of clouds
  
• octant go
  a measuring instrument for measuring angles to a celestial body
  
• oximeter go
  a measuring instrument that measures the oxygen in arterial blood
  
• pedometer go
  measuring instrument for recording the number of steps taken in walking
  
• pelvimeter go
  measuring instrument for performing pelvimetry
  
• photometer go
  measuring instrument for measuring the luminous intensity of a source by comparing it (visually or photoelectrically) with a standard source
  
• piezometer go
  a measuring instrument for measuring high pressures
  
• pipet, pipette go
  measuring instrument consisting of a graduated glass tube used to measure or transfer precise volumes of a liquid by drawing the liquid up into the tube
  
• Pitot-static tube, Pitot head, Pitot tube go
  measuring instrument consisting of a combined Pitot tube and static tube that measures total and static pressure
  
• Pitot tube, Pitot go
  measuring instrument consisting of a right-angled tube with an open end that is directed in opposition to the flow of a fluid and used to measure the velocity of fluid flow
  
• plethysmograph go
  a measuring instrument for measuring changes in volume of a part or organ or whole body (usually resulting from fluctuations in the amount of blood it contains)
  
• potentiometer go
  a measuring instrument for measuring direct current electromotive forces
  
• quadrant go
  a measuring instrument for measuring altitude of heavenly bodies
  
• radar, microwave radar, radio detection and ranging, radiolocation go
  measuring instrument in which the echo of a pulse of microwave radiation is used to detect and locate distant objects
  
• rangefinder, range finder go
  a measuring instrument (acoustic or optical or electronic) for finding the distance of an object
  
• refractometer go
  measuring instrument for measuring the refractive index of a substance
  
• rheometer go
  an instrument for measuring the flow of liquids (especially arterial blood)
  
• scale, weighing machine go
  a measuring instrument for weighing
  
• sclerometer go
  a measuring instrument that measures the hardness of materials by penetrating them with a stylus that has a diamond point
  
• sector go
  measuring instrument consisting of two graduated arms hinged at one end
  
• seismograph go
  a measuring instrument for detecting and measuring the intensity and direction and duration of movements of the ground (as an earthquake)
  
• sensitometer go
  a measuring instrument for measuring the light sensitivity of film over a range of exposures
  
• sextant go
  a measuring instrument for measuring the angular distance between celestial objects
  
• sonar, echo sounder, asdic go
  a measuring instrument that sends out an acoustic pulse in water and measures distances in terms of the time for the echo of the pulse to return
  
• spherometer go
  a measuring instrument for measuring the curvature of a surface
  
• spirograph go
  a measuring instrument for recording the depth and rapidity of breathing movements
  
• spirometer go
  a measuring instrument for measuring the vital capacity of the lungs
  
• static tube go
  a measuring instrument used to measure static pressure in a stream of fluid
  
• synchroscope, synchronoscope, synchronizer, synchroniser go
  an instrument that indicates whether two periodic motions are synchronous (especially an instrument that enables a pilot to synchronize the propellers of a plane that has two or more engines)
  
• tachometer, tach go
  measuring instrument for indicating speed of rotation
  
• tape, tapeline, tape measure go
  measuring instrument consisting of a narrow strip (cloth or metal) marked in inches or centimeters and used for measuring lengths
  
• tensiometer go
  a measuring instrument for measuring the surface tension of a liquid
  
• tensiometer go
  a measuring instrument for measuring the tension in a wire or fiber or beam
  
• tensiometer go
  a measuring instrument for measuring the moisture content of soil
  
• thermometer go
  measuring instrument for measuring temperature
  
• timepiece, timekeeper, horologe go
  a measuring instrument or device for keeping time
  
• tonometer go
  measuring instrument for measuring tension or pressure (especially for measuring intraocular pressure in testing for glaucoma)
  
• torsion balance go
  measuring instrument designed to measure small forces by the torsion they exert on a thin wire
  
• variometer go
  a measuring instrument for measuring variations in a magnetic field
  
• Venturi tube go
  a short tube inserted into a pipeline and used to measure the quantity of a liquid that is flowing in the pipeline
  
• viscometer, viscosimeter go
  a measuring instrument for measuring viscosity
  
• wattmeter go
  an instrument for measuring in watts the flow of power in an electrical circuit