duochrome
Language: English
Part of speech: noun
Forms: form: duochromes
Etymology: From duo- + chrome.
Senses: examples: text: When using the duochrome, there may not be an exact endpoint because the chances of the spectacle refraction falling into a 0.25 DS endpoint are fairly remote.
ref: 2007, Andrew William Keirl, Caroline Christie, Clinical Optics and Refraction, page 108:
text: The duochrome should be used as the endpoint procedure for the initial MPMVA .
ref: 2004, Nancy B. Carlson, Nancy Carlson, Daniel Kurtz, Clinical Procedures for Ocular Examination, page 99:
text: If the responses are not appropriate, then the duochrome is not reliable for this patient and should be ignored.
ref: 2020, David B. Elliott, Clinical Procedures in Primary Eye Care, page 82:
glosses: The duochrome test, a test used by opticians to refine the correction of refractive error, in which the subject is asked to compare images presented with red and green backgrounds.
examples: text: Where a color original such as a transparency, color print, or color artwork is furnished, additional impact and interest can be obtained with the duochrome.
ref: 1967, The American Pressman - Volume 77, page 24:
text: […] used two tints for his underpaintings, a duochrome in effect, probably a cool grey tint for the shadows and a golden buff one for everything in sunlight.
ref: 1980, Algernon Newton, Nicholas Usherwood, Algernon Newton, R.A., 1880-1968, page 1918:
text: The duochrome differs from the duotone in that a fullcolor original is required for its preparation.
ref: 1990, Richard M. Schlemmer, Handbook of Advertising Art Production, page 217:
text: Films could also be tinted and toned, resulting in color duochromes.
ref: 2010, Richard Misek, Chromatic Cinema: A History of Screen Color, page 21:
coordinate_terms: monochrome
polychrome
glosses: An image composed of varying shades (grayscale) of two colors.
examples: text: Jugs 9-10 and 15 are obviously the last vestiges of earlier duochrome ware.
ref: 1931, Studies in Ancient Oriental Civilization - Issues 13-17, page 8:
text: Duochrome consists predominantly of red or brown on brown, buff, or cream.
ref: 1944, American Antiquity - Volumes 9-10, page 344:
text: These bowls were usually red slipped from rim edge down to several inches below the widest diameter, making the bowl a duochrome with red upper-body and tan lower-body.
ref: 1976, Bruce T. Ellis, Paul Alfred Francis Walter, Journal of the Museum of New Mexico, the Archaeological Society of New Mexico, the Santa Fe Society of the Archaeological Institute of America, page 16:
text: Unidentified black-on-gray (probably a duochrome related to the Chihuahua series), La Junta Focus.
ref: 1986, J. Charles Kelly, Jumano and Patarabueye: Relations at La Junta de los Rios, page 148:
glosses: A piece of pottery decorated in two colors.
examples: text: All was immaculately in keeping, a duochrome of terracotta and brick, with niches for Elizabeth II matching those of her great-great grandparents, Victoria and Albert, on the North Porch.
ref: 2010, Roger Williams, The Royal Albert Hall: A Masterpiece for the 21st Century:
text: A dank duochrome prevailed, matte silver and green-black, curled fog strangling the pines.
ref: 2018, Jonathan Kellerman, Jesse Kellerman, A Measure of Darkness:
glosses: A color scheme consisting of only two hues.
examples: text: So she'd worn one of her own creations, a duochrome that shifted from turquoise to a rich blue depending on how the light hit it.
ref: 2016, Opal Carew, Meat:
text: Duochrome flecks sparkled yellow on the plane's dark seats.
ref: 2019, Dahlia Adler, His Hideous Heart:
text: I'm like—like boring old burlap and you're a duochrome, ombre, brilliant rainbow.
ref: 2020, 10 Things I Hate about Pinky, page 61:
glosses: Fabric that shifts between two colors, depending on the angle of light, also, by extension, something made with such fabric.
examples: text: […] which seem to be positive for two fluorochromes, i.e., the intact duochrome and the first component of the disintegrated duochrome.
ref: 1997, Ivan Lefkovits, Immunology Methods Manual, page 1851:
text: Commercially available Cy7 duochromes have highly variable fluorescence properties from batch to batch as there appears to be little regard to standardization with respect to conjugation ratios used.
ref: 2008, Hua Gu, Klaus Rajewsky, B Cell Protocols, page 185:
glosses: A fluorochrome that shows up in either of two colors, depending on the type of biological material it stains.