quantic

algebrallinen muoto, homogeeninen polynomi, muoto puhekieltä A homogeneous polynomial in two or more variables.
1858, (w), A Fourth Memoir on Quantics, 1859, Philosophical Transactions of the Royal Society of London, Volume 148, http://books.google.com.au/books?id=flFFAAAAcAAJ&pg=PA421&dq=%22quantic%22%7C%22quantics%22+-intitle:quantics&hl=en&sa=X&ei=eD2XUsPkMcTlkgXx74GQCg&ved=0CFEQ6AEwBgv=onepage&q=%22quantic%22%7C%22quantics%22%20-intitle%3Aquantics&f=false page 421,

When the two quantics are the first derived functions of the same quantic of any odd order, the lineo-linear invariant does not vanish, but it is not an invariant of the single quantic.

74. The discriminant of a binary quantic, or the eliminant of a system of binary quantics, is an invariant.

We can see a priori that this must be the case, for if a given quantic has a square factor, it will have a square factor still when it is linearly transformed; or if a system of quantics have a common factor, they will still have a common factor when the equations are transformed.