noun (used with a singular verb)
Examples from the Web for diplomatics
The flowers and insects will give me that relaxation, with God's will, after my long researches in philology and diplomatics.The Crime of Sylvestre Bonnard|Anatole France
Only the surprise of it, his own dumb unreadiness, his unwonted lack of ingenuity and diplomatics had almost lost her to him.Nobody|Louis Joseph Vance
You have surely given him a great enough dose of diplomatics and canon law by this time.Joan of the Sword Hand|S(amuel) R(utherford) Crockett
Mabillon in his De re diplomatica creates the science of documents or diplomatics.
These however are conjectures which I submit with deference to the determination of those versed in diplomatics.