stannic
adjective
stan·nic ˈsta-nik 
: of, relating to, or containing tin especially with a valence of four
Word History
Etymology
probably from French stannique, from Late Latin stannum tin, from Latin stagnum, an alloy of silver and lead
First Known Use
1790, in the meaning defined above
Medical Definition
stannic
adjective
stan·nic ˈstan-ik
: of, relating to, or containing tin especially with a valence of four