What is Allosaurus?

Allosaurus definition and meaning on Dictionary terms:
a substance composed of two or more metals, or of a metal or metals with a nonmetal, intimately mixed, as by fusion or electrodeposition.
a less costly metal mixed with a more valuable one.
standard; quality; fineness.
admixture, as of good with evil.

anything added that serves to reduce quality or purity.

verb (used with object)
to mix (metals or metal with nonmetal) so as to form an alloy.
to reduce in value by an admixture of a less costly metal.

to debase, impair, or reduce by admixture; adulterate.