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

Roget 445: optical instruments; lens, meniscus, magnifier, sunglass, magnifying glass, hand lens; microscope, megascope^†, tienoscope^†.    spectacles, specs [Coll.], glasses, barnacles, goggles, eyeglass, pince-nez, monocle, reading glasses, bifocals; contact lenses, soft lenses, hard lenses; sunglasses, shades [Coll.].    periscopic lens^†; telescope, glass, lorgnette; spyglass, opera glass, binocular, binoculars, field glass; burning glass, convex lens, concave lens, convexo-concave lens^†, coated lens, multiple lens, compound lens, lens system, telephoto lens, wide-angle lens, fish-eye lens, zoom lens; optical bench.    astronomical telescope, reflecting telescope, reflector, refracting telescope, refractor, Newtonian telescope, folded-path telescope, finder telescope, chromatoscope; X-ray telescope; radiotelescope, phased-array telescope, Very Large Array radiotelescope; ultraviolet telescope; infrared telescope; star spectroscope; space telescope.    [telescope mounts] altazimuth mount, equatorial mount.    refractometer, circular dichroism spectrometer.    interferometer.    phase-contrast microscope, fluorescence microscope, dissecting microscope; electron microscope, transmission electron microscope; scanning electron microscope, SEM; scanning tunneling electron microscope.    [microscope components] objective lens, eyepiece, barrel, platform, focusing knob; slide, slide glass, cover glass, counting chamber; illuminator, light source, polarizer, [component parts of telescopes] reticle, cross-hairs.    light pipe, fiber optics mirror, reflector, speculum; looking-glass, pier-glass, cheval-glass, rear-view mirror, hand mirror, one-way mirror, magnifying mirror.    [room with distorting mirrors] fun house.    prism, diffraction grating; beam splitter, half-wave plate, quarter-wave plate.    camera lucida [Lat.], camera obscura [Lat.]; magic lantern etc. (show) 448; stereopticon; chromatrope^†, thaumatrope^†; stereoscope, pseudoscope^†, polyscope^†, kaleidoscope.    photometer, eriometer^†, actinometer^†, lucimeter^†, radiometer; ligth detector, photodiode, photomultiplier, photodiode array, photocell.    X-ray diffractometer, goniometer.    spectrometer, monochrometer, UV spectrometer, visible spectrometer, Infrared spectrometer, Fourier transform infrared spectrometer, recording spectrometer; densitometer, scanning densitometer, two-dimensional densitometer.    abdominoscope^†, gastroscope [Med.], helioscope^†, polariscope^†, polemoscope^†, spectroscope.    abdominoscopy^†; gastroscopy [Med.]; microscopy, microscopist.    ... show more

Roget 466: measurement, admeasurement^†, mensuration, survey, valuation, appraisement, assessment, assize; estimate, estimation; dead reckoning, reckoning etc. (numeration) 85; gauging etc. v.; horse power.    metrology, weights and measures, compound arithmetic.    measure, yard measure, standard, rule, foot rule, compass, calipers; gage, gauge; meter, line, rod, check; dividers; velo^†.    flood mark, high water mark; Plimsoll line; index etc. 550.    scale; graduation, graduated scale; nonius^†; vernier etc. (minuteness) 193.    [instruments for measuring] bathometer, galvanometer, heliometer, interferometer, odometer, ombrometer^†, pantometer^†, pluviometer^†, pneumatometer^†, pneumometer^†, radiometer, refractometer, respirometer, rheometer, spirometer^†, telemeter, udometer^†, vacuometer^†, variometer^†, viameter^†, thermometer, thermistor (heat) etc. 382, barometer (air) etc. 338, anemometer (wind) 349, dynamometer, goniometer, (angle) 244 meter; landmark etc. (limit) 233; balance, scale etc. (weight) 319; marigraph^†, pneumatograph^†, stethograph^†; rain gauge, rain gage; voltmeter (volts), ammeter (amps); spectrophotometer (light absorbance); mass spectrophotometer (molecular mass); geiger counter, scintillation counter (radioactivity); pycnometer (liquid density); graduated cylinder, volumetric flask (volume); radar gun (velocity); radar (distance); side-looking radar, (shape, topography); sonar (depth in water); light meter (light intensity); clock, watch, stopwatch, chronometer (time); anemometer (wind velocity); densitometer (color intensity). measurability, computability, determinability^†.    coordinates, ordinate and abscissa, polar coordinates, latitude and longitude, declination and right ascension, altitude and azimuth.    geometry, stereometry^†, hypsometry^†; metage^†; surveying, land surveying; geodesy, geodetics^†, geodesia^†; orthometry^†, altimetry^†; cadastre [Fr.].    astrolabe, armillary sphere^†.    land surveyor; geometer.    ... show more

Roget 244: angularity, angularness^†; aduncity^†; angle, cusp, bend; fold etc. 258; notch etc. 257; fork, bifurcation.    elbow, knee, knuckle, ankle, groin, crotch, crutch, crane, fluke, scythe, sickle, zigzag, kimbo^†, akimbo.    corner, nook, recess, niche, oriel [Arch.], coign^†.    right angle etc. (perpendicular) 216.1, 212; obliquity etc. 217; angle of 45 degrees, miter; acute angle, obtuse angle, salient angle, reentering angle, spherical angle.    angular measurement, angular elevation, angular distance, angular velocity; trigonometry, goniometry; altimetry^†; clinometer, graphometer^†, goniometer; theodolite; sextant, quadrant; dichotomy.    triangle, trigon^†, wedge; rectangle, square, lozenge, diamond; rhomb, rhombus; quadrangle, quadrilateral; parallelogram; quadrature; polygon, pentagon, hexagon, heptagon, octagon, oxygon^†, decagon.    pyramid, cone.    Platonic bodies; cube, rhomboid; tetrahedron, pentahedron, hexahedron, octahedron, dodecahedron, icosahedron, eicosahedron; prism, pyramid; parallelopiped; curb roof, gambrel roof, mansard roof.    ... show more

Polish: goniometr