The refractivity, however, shows a greater difference; for the admixture of helium and neon in the crude sample lowers the refractivity from 0.9665 for the pure gas to 0.961 or 0.960. From Wordnik.com. [Sir William Ramsay - Nobel Lecture] Reference
The measure of this refractivity -- how much the atmosphere bends radio waves -- is called a "K-factor.". From Wordnik.com. [WBAY Action 2 News] Reference
I ineluctably stygian to the benefice refractivity and nonglutinous up arena quip in eucaryote for two dysgenesis. From Wordnik.com. [Rational Review] Reference
In other words, the genome regions with the highest refractive index - undoubtedly enhanced by the proteins bound to the repetitive DNA - are concentrated in the interior, followed by the sequences with the next highest level of refractivity, to prevent against the scattering of light. From Wordnik.com. [Evolution News & Views] Reference
Its pronounced refractivity, and the ease with which it may be worked, makes bakelite a favourite substitute for amber (Ger. From Wordnik.com. [Synthetic Tannins] Reference
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