I would say it is related to this post about magnetic flux quanta.
A quanta is a unit of something. For instance the electron is a fundamental unit of charge.
Or just look at this definition of quanta.
http://www.Google.com/search?hl=en&biw=1280&bih=623&q=quantum&tbs=dfn:1&tbo=u&sa=X&ei=5LnuTdmrBI_-rAGVpfC8CA&ved=0CBYQkQ4
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"Magnetic flux density" is also known as the magnetic field,The SI unit for this is the Tesla, written as T.CommentMagnetic flux density is not "also known as the magnetic field". It describes the intensity of a magnetic field.
Flux density is the number of magnetic lines crossing per unit area in perpeendicular direction. It is named as manetic field induction, B. Unit is tesla or weber/m2 Unit for magnetic flux is weber in SI system. Fl
In the position where the dirction of the magnetic field is perpendicular (normal) to the unit area.
Nikola Tesla http://en.wikipedia.org/wiki/Nikola_Tesla
With constant number of windings and current, the magnetic field density of a solenoid remains constant. However, magnetic flux is determined by the flow of magnetic field force through a given area. Therefore, the area is linearly and directly proportional to the magnetic flux.