noun. An optical instrument for measuring crystal angles, as between crystal faces.

noun. A radio receiver and directional antenna used as a system to determine the angular direction of incoming radio signals.

noun. An instrument for measuring solid angles, or the inclination of planes, particularly the angles formed by the faces of crystals.

noun. An instrument for measuring angles, especially the angles of crystals, or the inclination of planes.

noun. a goniometer having two movable arms (ab, cd), between which (at ab) the faces of the crystals are placed. These arms turn about a fixed point, which is the center of the graduated circle or semicircle upon which the angle is read off.

noun. undefined

noun. an instrument for measuring the angles of crystals by determining through what angular space the crystal must be turned so that two rays reflected from two surfaces successively shall have the same direction; -- called also Wollaston's goniometer, from the inventor.

noun. A device used to measure the angles of crystals.

noun. A radio direction finder.

noun. An arthrometer (device for measuring the arc or range of mobility of a joint).

noun. direction finder that determines the angular direction of incoming radio signals

"MN This is a goniometer or instrument for measuring angles; it was a precision instrument, lightweight and easy to transport, and was used at sea to measure distances by angle and the height of heavenly bodies, which permitted the observer to determine his position."

mandibular goniometer  occipital goniometer  three circle goniometer  two-circle goniometer  

hand goniometer  

direction finder  

accelerometer  anemometer  densitometer  dynamometer  fluorometer  

daguerreotype  solida