an instrument for measuring the length of curved lines
Crossword Clue

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AnswerCrossword Clue
rotameteran instrument for measuring the length of curved lines
rotametersROTAMETER, an instrument for measuring the length of curved lines
opisometeran instrument for measuring curved lines
opisometersOPISOMETER, an instrument for measuring curved lines
protractorsAn instrument for measuring angles, typically in the form of a flat semicircle marked with degrees along the curved edge
protractorAn instrument for measuring angles, typically in the form of a flat semicircle marked with degrees along the curved edge
focometeran instrument for measuring the focal length of a lens also FOCIMETER
focimeteran instrument for measuring the focal length of a lens also FOCOMETER
focimetersFOCIMETER, an instrument for measuring the focal length of a lens also FOCOMETER
focometersFOCOMETER, an instrument for measuring the focal length of a lens also FOCIMETER
crosshairsA pair of fine wires or lines crossing at right angles at the focus of an optical instrument or gun sight, for use in positioning, aiming, or measuring
microphotometeran instrument for measuring the amount of light transmitted or reflected by small areas or for measuring the relative densities of spectral lines on a photographic film or plate
microphotometrymeasurement by microphotometer, an instrument for measuring the amount of light transmitted or reflected by small areas or for measuring the relative densities of spectral lines on a photographic film or plate