See Also: glucosaminoglycans(medicine)

refraction (iou) and glucosaminoglycans (medicine)


refraction (iou)



refraction noun. L16.
[French refraction or late Latin refractio(n-), formed as REFRACT: see -ION.]
The action of breaking open or breaking up. rare. L16-M17.
Physics. The fact or phenomenon of light, radio waves, etc., being deflected in passing obliquely through the interface between one medium and another or through a medium of varying density; change in direction of propagation of any wave as a result of its travelling at different speeds at different points along the wave front; an instance of this. E17.
The action of a medium in refracting light; refractive power or effect. M17.
A reduction on a charge or bill. Only in 18.
(The process of determining) the percentage of impurities in a sample of nitre. M-L19.
Measurement of the focusing characteristics of an eye or eyes. E20.
Phrases: angle of refraction the angle made by a refracted ray with the perpendicular to the refracting surface. double refraction: see DOUBLE adjective. index of refraction = refractive index s.v. REFRACTIVE 4. SEISMIC refraction. specific refraction: see SPECIFIC adjective.
Comb.: refraction profiling Geology profiling by means of refraction shooting; refraction shooting Geology seismic prospecting in which shock waves generated at the earth's surface are detected along a line some miles long, giving information about the nature and depth of underlying strata.
refractionist noun a person skilled in applying the laws of refraction, esp. for the correction of visual defects L19.

glucosaminoglycans (medicine)


glucosaminoglycans
Glycosaminoglycans (or mucopolysaccharides) in which all of the constituent sugar amines are glucosamines.


470956