**Definition:** A homogeneous algebraic function of two or more variables,

in general containing only positive integral powers of the variables,

and called quadric, cubic, quartic, etc., according as it is of the

second, third, fourth, fifth, or a higher degree. These are further

called binary, ternary, quaternary, etc., according as they contain

two, three, four, or more variables; thus, the quantic / is a binary

cubic.