testimonium
noun
tes·ti·mo·ni·um
ˌtestəˈmōnēəm
plural testimoniums
-ēəmz
or testimonia -ēə
1
archaic : testimonial sense 2b
2
: the final or authenticating clause of an instrument that typically begins "In witness whereof" and furnishes such information as when it was signed and before what witnesses
Word History
Etymology
Latin, witness, evidence