What is sangvivorous?

Did you mean "Sanguivorous"? If so:

This Word is an adjective.

It means to feed on blood, like leeches, some insects, and bats.

sangui-

A combining form meaning "blood" used in the formation of technical terms: sanguiferous.

Origin:

Combined form of Latin sanguis, sanguin- blood

-vorous

A combining form meaning "eating, gaining sustenance from" that specified by the initial element: carnivorous.

Origin:

Latin -vorus: devouring