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opaque

[oh-peyk] /oʊˈpeɪk/
adjective
1.
not transparent or translucent; impenetrable to light; not allowing light to pass through.
2.
not transmitting radiation, sound, heat, etc.
3.
not shining or bright; dark; dull.
4.
hard to understand; not clear or lucid; obscure:
The problem remains opaque despite explanations.
5.
dull, stupid, or unintelligent.
noun
6.
something that is opaque.
7.
Photography. a coloring matter, usually black or red, used to render part of a negative opaque.
verb (used with object), opaqued, opaquing.
8.
Photography. to cover up blemishes on (a negative), especially for making a printing plate.
9.
to cause to become opaque.
Origin
late Middle English
1375-1425
1375-1425; late Middle English opake < Latin opācus shaded
Related forms
opaquely, adverb
opaqueness, noun
subopaque, adjective
subopaquely, adverb
subopaqueness, noun
Synonyms
1. murky, cloudy, muddy.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for opaqued

opaque

/əʊˈpeɪk/
adjective
1.
not transmitting light; not transparent or translucent
2.
not reflecting light; lacking lustre or shine; dull
3.
not transmitting radiant energy, such as electromagnetic or corpuscular radiation, or sound
4.
hard to understand; unintelligible
5.
unintelligent; dense
noun
6.
(photog) an opaque pigment used to block out particular areas on a negative
verb (transitive) opaques, opaquing, opaqued
7.
to make opaque
8.
(photog) to block out particular areas, such as blemishes, on (a negative), using an opaque
Derived Forms
opaquely, adverb
opaqueness, noun
Word Origin
C15: from Latin opācus shady
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Word Origin and History for opaqued

opaque

adj.

early 15c., opake, from Latin opacus "shaded, in the shade, shady, dark, darkened, obscure," of unknown origin. Spelling influenced after c.1650 by French opaque (c.1500), from the Latin. Figurative use from 1761. Related: Opaquely; opaqueness.

Online Etymology Dictionary, © 2010 Douglas Harper
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opaqued in Medicine

opaque o·paque (ō-pāk')
adj.
Impenetrable by light; neither transparent nor translucent.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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opaqued in Science
opaque
  (ō-pāk')   
Resistant to the transmission of certain kinds of radiation, usually light. Metals and many minerals are opaque to light, while being transparent to radio waves and neutrinos. Compare translucent, transparent.

The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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