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spectra

   Also found in: Medical, Acronyms, Encyclopedia, Wikipedia 0.01 sec.
spec·tra  (spktr)
n.
A plural of spectrum.

spectra [ˈspɛktrə]
n
the plural of spectrum


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Sir,--I have read with amusement, not wholly unmixed with some less complimentary emotion, the complacent and wholly fatuous letter of James Wilson MacPhail which has lately appeared in your columns upon the subject of the blurring of Fraunhofer's lines in the spectra both of the planets and of the fixed stars.
 
 
 
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