The Collaborative International Dictionary
Dactyliology
Dactyliology \Dac*tyl`i*ol"o*gy\, n. [Gr. dakty`lios finger ring + -logy.] (Fine Arts)
That branch of arch[ae]ology which has to do with gem engraving.
That branch of arch[ae]ology which has to do with finger rings.
Wiktionary
dactyliology
n. 1 The branch of archaeology dealing with gem engrave. 2 The branch of archaeology dealing with finger rings.