Late 16th century; earliest use found in John Harvey (bap. 1564, d. 1592), astrologer. From Hellenistic Greek πολυγράϕος (adjective) writing much + -ical. In later use partly also from polygraph + -ical.
Definition of polygraphical in US English:
polygraphical
adjectiveˌpɒlɪˈɡrafɪkl
Polygraphic.
Origin
Late 16th century; earliest use found in John Harvey (bap. 1564, d. 1592), astrologer. From Hellenistic Greek πολυγράϕος (adjective) writing much + -ical. In later use partly also from polygraph + -ical.