Curcumin is the yellow pigment associated with the curry spice, Turmeric, and to a lesser extent Ginger. It is a small molecule that is the prototypical 'curcuminoid', and has effects similar to other polyphenols but unique in a way as it is a different class of polyphenol (relative to the other classes of 'flavonoid', 'stilbene', etc.)
The most simple definition of virtualization is the creating of a virtual version of something. This could be an operating system, server, storage device, or other resources. One common example would be someone who has divided their hard drive into multiple partitions. Uses.
There are many different types of virtualization. The most common virtualization definition is to take a server and create virtual computers within it to run software. Server virtualization allows multiple copies of Windows and/or Linux to be ran off of the same physical server. One physical server can run as many virtual servers as the hardware can support.