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Collins

contrast medium

  

      n     (Med)   a radiopaque substance, such as barium sulphate, used to increase the contrast of an image in radiography  
Dictionnaire anglais Collins English definition-Thesaurus  
Collins
contrast  
      vb  
1    often foll by: with   to distinguish or be distinguished by comparison of unlike or opposite qualities  
      n  
2    distinction or emphasis of difference by comparison of opposite or dissimilar things, qualities, etc. (esp. in the phrases by contrast, in contrast to or with)  
3    a person or thing showing notable differences when compared with another  
4    (in painting) the effect of the juxtaposition of different colours, tones, etc.  
5   
a    (of a photographic emulsion) the degree of density measured against exposure used  
b    the extent to which adjacent areas of an optical image, esp. on a television screen or in a photographic negative or print, differ in brightness  
6      (Psychol)   the phenomenon that when two different but related stimuli are presented close together in space and/or time they are perceived as being more different than they really are  
     (C16: (n): via French from Italian, from contrastare (vb), from Latin contra- against + stare to stand)  
  contrastable      adj  
  contrastably      adv  
  contrasting      adj  
  contrastive      adj  
  contrastively      adv  


colour contrast  
      n     (Psychol)   the change in the appearance of a colour surrounded by another colour; for example, grey looks bluish if surrounded by yellow  
contrast medium  
      n     (Med)   a radiopaque substance, such as barium sulphate, used to increase the contrast of an image in radiography  
phase-contrast microscope  
      n   a microscope that makes visible details of colourless transparent objects. It employs a method of illumination such that small differences of refractive index of the materials in the object cause differences of luminous intensity by interference  

Dictionnaire anglais Collins English definition-Thesaurus  

Collins

contrast

  
1   
      n   comparison, contrariety, difference, differentiation, disparity, dissimilarity, distinction, divergence, foil, opposition  
2   
      vb   compare, differ, differentiate, distinguish, oppose, set in opposition, set off  

Dictionnaire anglais Collins English synonyme-Thesaurus  

Dictionnaire Collaboratif     Anglais Définition
n.
a satisfactory compromise between two opposed things ; a course of action or state that is between two extremes
Ex: There were solid arguments for both sides and after hours of endless discussions, a happy medium that could satisfy each camp was still to be struck
n.
cyber protest is expression of complaint through the medium of electronic communication on the electronic and digital Medias.
[Tech.];[Leg.]
n.
a state of connectivity to the cyberspace through a medium of internet or computer network
[Tech.]
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