| double refraction |
splitting a ray into two parallel rays polarized perpendicularly
Ãâó: wordnet.princeton.edu/perl/webwn
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| double salt |
a solution of two simple salts that forms a single substance on crystallization
Ãâó: wordnet.princeton.edu/perl/webwn
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| double vision |
diplopia: visual impairment in which an object is seen as two objects; "diplopia often disappears when one eye is covered"
Ãâó: wordnet.princeton.edu/perl/webwn
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| double blind |
a test procedure in which the identity of those receiving the intervention is concealed from both the administrators and the subjects until after the test is completed; designed to reduce or eliminate bias in the results
Ãâó: wordnet.princeton.edu/perl/webwn
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| double helix |
a pair of parallel helices intertwined about a common axis; "the shape of the DNA molecule is a double helix"
Ãâó: wordnet.princeton.edu/perl/webwn
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