Association of British Scrabble Players

Science & Tech > Physics > Optics


Now updated for CSW15. New words, if any, and new inflections of existing words, are shown in red.


achromatic free from colour; transmitting light without decomposing it into its constituent colours.
achromatically (Adv.) ACHROMATIC, free from colour.
anaclastic refractive; of or pertaining to refraction.
anticathode the target of an X-ray tube, on which the cathode rays are focused and from which X-rays are emitted.
aplanatic of a lens, free of spherical aberration.
aplanatically (Adv.) APLANATIC, of a lens, free of spherical aberration.
aplanatism freedom from spherical aberration.
apochromat an apochromatic lens or instrument.
bathochrome a shift to a longer wavelength in the absorption spectrum of a compound.
bathochromic denoting or relating to a shift to a longer wavelength in the absorption spectrum of a compound.
bifocal having two focal points.
biprism a prism having a highly obtuse angle to facilitate beam splitting.
birefringence the refraction of light in an anisotropic material (as calcite) in two slightly different directions to form two rays.
birefringent relating to birefringence.
catadioptric relating to or employing both reflection and refraction, as in the construction of some long-focal-length photographic lenses.
catadioptrical relating to or employing both reflection and refraction, as in the construction of some long-focal-length photographic lenses.
catoptric relating to reflection.
catoptrical relating to reflection.
catoptrics the branch of optics which is concerned with reflected light.
chromatics the science of colors; that part of optics which treats of the properties of colors.
chromophore the group of atoms in a chemical compound responsible for its colour.
chromophoric of or like a chromophore, the group of atoms in a chemical compound responsible for its colour.
chromophorous of or like a chromophore, the group of atoms in a chemical compound responsible for its colour.
chromoscope an apparatus for combining coloured images.
collimate to make parallel; to adjust accurately the line of sight of (an optical instrument, such as a surveying telescope).
confocal relating to a type of microscope.
confocally (Adv.) CONFOCAL, relating to a type of microscope.
depolarizer an agent for depolarizing.
desaturation the inverse of saturation, the degree to which a colour departs from white and approaches a pure spectral wavelength.
dextrorotary turning to the right, esp turning plane of polarized light.
dextrorotatory turning to the right, esp turning plane of polarized light.
diactinic capable of transmitting actinic rays.
diaphaneity the quality of transmitting light.
dichroic having two colours; as, a dichroic crystal.
dichroism the property of showing different colours exhibited by doubly refracting crystals when viewed in different directions by transmitted light.
dichroitic having two colours; as, a dichroic crystal.
dichromaticism the property of presenting different colours by transmitted light, when viewed in two different directions.
diffraction a modification which light undergoes esp in passing by the edges of opaque bodies or through narrow openings and in which the rays appear to be deflected.
diffractive causing diffraction.
diffractively (Adv.) DIFFRACTIVE, causing diffraction.
diffractiveness the state of being diffractive, causing diffraction.
dioptrical transparent.
dioptrically (Adv.) DIOPTRICAL, relating to dioptrics.
dioptrics the study of light refraction.
enantiomer an enantiomorph, an object which is the mirror image of another.
enantiomeric of or like an enantiomer.
enantiomorph an object which is the mirror image of another.
enantiomorphic of or like an enantiomorph.
enantiomorphism the state of being enantiomorphic.
enantiomorphous of or like an enantiomorph.
enantiomorphy the state of being an enantiomorph, an object which is the mirror image of another.
etalon (Fr.) an interferometer used to measure wavelengths, consisting of an air film enclosed between half-silvered plane-parallel glass or quartz plates.
eyepiece the piece on eg a telescope that one looks through.
eyepoint the point at which the eye is placed when using an optical instrument.
filar of eg a microscope, having threads or wires.
fluorescence visible light emitted from a material while it is exposed to ultraviolet radiation, aka black light.
focalise to bring to a focus.
focalize to bring to a focus.
focus (Lat.) a point at which rays or waves (of light, heat, sound, etc.) meet after reflection or refraction (verb) to bring to a focus
focusable able to be focused.
focusless without focus.
holophotal of reflectors, throwing back the rays of light without perceptible loss.
horopter the locus of all points in space that stimulate points on each eye that yield the same visual direction as each other.
hyperfocal referring to the minimum distance from a lens at which all objects can be focussed clearly.
infrared between the red end of the visible spectrum and microwaves; (noun) infrared radiation.
iriscope an instrument for exhibiting the prismatic colours.
kaleidophone an instrument for demonstrating sound waves by lines of light.
lightwave relating to a wave of light. No -S.
misfocus to focus wrongly.
monocular a field glass or microscope for use with one eye.
multiphoton having many photons.
optic relating to vision (noun) an eye
opticist one who studies light and vision.
optics the study of light.
optophone a device transforming light into sound.
optronics the study or use of devices involving the interaction of electronic and light signals.
paraxial of a light ray, parallel to the axis of an optical system.
parfocal having lenses with corresponding focal points in the same plane.
parfocalise to make parfocal.
parfocality the state of being parfocal.
parfocalize to make parfocal.
pellucid perfectly transparent.
pellucidity the state of being pellucid.
pellucidly (Adv.) PELLUCID, perfectly transparent.
phonopore a kind of sound-conducting apparatus.
photic of light, light-giving.
photically (Adv.) PHOTIC, of light, light-giving.
photics the science of light, optics.
photochromic changing colour, and hence changing the amount of light transmitted when the incident light increases, or decreases; (noun) a photochromic material.
phototropy change of colour due to wavelength of incident light.
pleochroic displaying different colours when seen from different directions.
pleochroism the property of differentially absorbing different wavelengths of light depending on their direction of incidence or state of polarization.
polarisable that can be polarised.
polarisation the act of affecting radiation and esp light so that the vibrations of the wave assume a definite form.
polarise to modify normally transverse light vibrations so that they are confined to one plane.
polariser a device for polarising light.
polarizable that can be polarized.
polarization the act of affecting radiation and esp light so that the vibrations of the wave assume a definite form.
polarize to modify normally transverse light vibrations so that they are confined to one plane.
polarizer a device for polarising light.
polychroic displaying different colours when seen from different directions.
polychroism the state of being polychroic.
prismatic of, resembling or produced by prisms.
prismatical of, resembling or produced by prisms.
prismatically (Adv.) PRISMATICAL, of, resembling or produced by prisms.
reflect to turn or throw back from a surface.
reflectance the ratio of reflected radiation to incident radiation.
reflectingly (Adv.) REFLECTING.
reflective capable of reflecting light, images, or sound waves.
reflectively (Adv.) REFLECTIVE, capable of reflecting light, images, or sound waves.
reflectogram an image produced by reflectography.
reflectorise to make reflecting.
reflectorize to make reflecting.
refract to deflect in a particular manner, as a ray of light.
refractable that can be refracted.
refraction the bending of waves or rays of energy.
refractive serving to refract.
refractively (Adv.) REFRACTIVE, serving to refract.
refractor a refracting telescope.
refringency refractivity.
refringent pertaining to, or possessing, refringency.
reticle an attachment to an optical instrument consisting of a network of lines of reference.
speculum (Lat.) a coloured patch on a bird's wing.
spyglass a small handheld telescope.
stenopaeic of spectacles, optical instruments, etc., having a narrow slit or aperture; designating such a slit.
stenopaic of spectacles, optical instruments, etc., having a narrow slit or aperture; designating such a slit.
stereoptics the optics of stereoscopy.
stereoscopy the use of a stereoscope.
sunglass a convex lens of glass for producing heat by converging the sun's rays into a focus.
supertwist a technique of twisting light rays, used to improve the quality of lcds.
telescope an optical instrument for viewing objects at a distance; (verb) to collapse part within part, like a telescope.
telestereoscope an instrument for viewing distant objects stereoscopically.
tristimulus as in tristimulus values, amounts of each of three colour primaries that must be combined to form an objective colour match with a sample.
uniaxial having but one optic axis, or line of no double refraction.
uniaxially (Adv.) UNIAXIAL, having but one optic axis, or line of no double refraction.
varifocal of spectacles, having differing focal lengths.