Reference > Roget’s > International Thesaurus > 420. Light.
Mawson, C.O.S., ed. (1870–1938). Roget’s International Thesaurus. 1922.
Class III. Words Relating to Matter
Section III. Organic Matter
2. Sensation
(6) Light
(i) Light in General
420. Light.
NOUN:LIGHT, ray, beam, stream, gleam, streak, pencil; sunbeam, moonbeam; aurora, dawn.
  day; sunshine; light of -day, - heaven; sun (luminary) [See Luminary], daylight, broad daylight, noontide light; noontide, noon-day.
  glow &c. v.; afterglow, sunset glow; glimmering &c. v.; glint; glare; play -, glare -, flood- of light; phosphorescence, lambent flame.
  HALO, glory, nimbus, aureola, aureole, gloriole [rare], aura.
  SPARK, scintilla; facula; sparkling &c. v.; emication [obs.], scintillation, flash, blaze, coruscation, fulguration [now rare]; flame (fire) [See Heat]; lightning, levin; ignis fatuus [L.] (luminary) [See Luminary].
  LUSTER or lustre, sheen, shimmer, reflection or reflexion; gloss, tinsel, spangle, brightness, brilliancy, splendor or splendour, effulgence, refulgence; fulgor, fulgidity [rare]; dazzlement, resplendence or resplendency, transplendency [rare], luminousness &c. adj.; luminosity; lucidity; nitency [rare]; radiance, radiation; irradiation, illumination.
  [SCIENCE OF LIGHT] optics; photology, photics; actinology, actinometry, radiology, heliology, radiometry, radioscopy, photometry, dioptrics, catoptrics; photography, photolithography, photomicography, phototelegraphy, radiotelegraphy; phototherapy, heliotherapy, radiotherapy; heliometry, heliography.
  actinic rays, actinism; radioactivity, radium emanation, exradio; Röntgen rays, X-rays, ultra-violet rays; photometer [See Optical Instruments]; heliometer, refractometer.
  [DISTRIBUTION OF LIGHT] chiaroscuro or chiaro-oscuro [It.], clair-obscure, clair-obscur [F.], mezzotint, mezzotinto, half tone or half-tone, demitint, half tint; breadth, light and shade, black and white, tonality.
  reflection, refraction, dispersion; refractivity.
  ILLUMINANT, artificial light; gas [See Luminary].
VERB:SHINE, glow, beam, glitter; glister, glisten; twinkle, gleam; flare, flare up; glare, shimmer, glimmer, flicker, sparkle, scintillate, coruscate, flash, blaze; be bright &c. adj.; reflect light, daze, dazzle, bedazzle, radiate, shoot out beams; fulgurate, phosphoresce.
  clear up, brighten.
  LIGHTEN, enlighten; levin; light, light up; irradiate, shine upon; give -, hang out a - light; cast -, throw -, shed- -luster, - light- upon; illume, illumine, illuminate; relume, strike a light; kindle (set fire to) [See Calefaction].
ADJECTIVE:LUMINOUS, luminiferous; shining &c. v.; lucid, lucent, luculent, luciferous [rare], lucific [rare]; illuminate [archaic], illuminant, light, lightsome; bright, vivid, splendent, nitid, lustrous, shiny, beamy, scintillant, fulgurant, radiant, lambent; sheen [dial. or poetic], sheeny; glossy, burnished, glassy, sunny, orient, meridian; noonday, noontide; cloudless, clear; unclouded, unobscured.
  garish; resplendent, transplendent [rare]; refulgent, effulgent, fulgid, fulgent, relucent, splendorous or splendrous, splendid, blazing, in a blaze, ablaze, rutilant, meteoric, phosphorescent; aglow.
  bright as silver; light -, bright- as -day, - noonday, - the sun at noonday.
  [SCIENTIFIC] actinic, radioactive; optic, optical, photologic or photological, heliological; photogenic, photographic; helio-graphic; heliophagous.
  1. A day for gods to stoop and men to soar.—Tennyson
  2. Dark with excessive bright.—Paradise Lost
  3. Hail holy light! offspring of heav’n first-born.—Paradise Lost
  4. And noon lay heavy on flower and tree.—Shelley



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