What is this word "graze" here standing for? can any one interpret for me?



For example the Chandra X-Ray Observatory launched in 2002 had a design that allowed protons and ions to be focused onto the CCD sensors through grazing from the telescope mirrors.


Is there any appropriate word to substitute grazing this word here according to its context?


I interpret it as "covering" or "scraping" and which one is preferred or any other better substitute?


Thanks a lot

Aug 7, 2014 3:49 AM