1. (n.) An array of light waves, including red, orange, yellow, green, blue, indigo, and violet; the several colored and other rays of which light is composed, separated by the refraction of a prism or other means, and observed or studied either as spread out on a screen, by direct vision, by photography, or otherwise. See Spectroscope.
2. (n.) An apparition; a specter.
3. (n.) A luminous appearance, or an image seen after the eye has been exposed to an intense light or a strongly illuminated object. When the object is colored, the image appears of the complementary color, as a green image seen after viewing a red wafer lying on white paper. Called also ocular spectrum.
Thesaurus Entries
AF, CPS, Dalmatian, EHF, HF, Hz, Indian file, MF, Maxwell triangle, Munsell scale, RF, SHF, UHF, VHF, VLF, afterimage, antigorite, array, articulation, audio frequency, bank, bogey, butterfly, buzz, candy cane, carrier frequency, carry, catena, catenation, chain, chain reaction, chaining, chameleon, cheetah, chromatic circle, chromatic spectrum, chromaticity diagram, chrysotile, color circle, color cycle, color index, color mixture curve, color solid, color spectrum, color system, color triangle, compass, complementary color, concatenation, confetti, connection, consecution, continuum, course, crazy quilt, cycle, cycles, demitint, descent, diapason, drone, eidolon, endless belt, endless round, extremely high frequency, file, filiation, firedog, frequency, frequency spectrum, full color, fundamental colors, gamut, ghost, gradation, half tint, halftone, harlequin, haunt, hertz, high frequency, hue cycle, hum, intermediate frequency, iris, jaguar, kilocycles, kilohertz, leopard, line, lineage, low frequency, lower frequencies, mackerel, mackerel sky, marble, marbled paper, medium frequency, megacycles, megahertz, metamer, moire, monochrome, monotone, mother-of-pearl, nacre, nexus, ocelot, ocular spectrum, opal, ophite, optical illusion, patchwork quilt, peacock, pendulum, periodicity, phantasm, plenum, powder train, primary, primary color, progression, pure color, queue, radio frequency, radius, rainbow, range, rank, reach, recurrence, register, reticulation, revenant, rotation, round, routine, row, run, scale, scope, secondary, secondary color, sequence, series, serpentine, serpentine marble, shade, shot silk, single file, solar spectrum, spark frequency, spectral color, spectrum color, spirit, spook, stretch, string, succession, superhigh frequency, swath, sweep, tertiary, tertiary color, thread, tier, tortoise shell, train, trick of eyesight, ultrahigh frequency, upper frequencies, very high frequency, very low frequency, windrow, zebra
