Home › Words › P › plastromancyplastromancyplastromancy · noun — A form of divination through the use of turtleshell plastrons.Definition from Wiktionary (CC BY-SA 3.0).Among words judged in Lexicurio's Arena, plastromancy ranks #8,665 of 43,042 for Qualifying.EtymologyFrom plastron + -mancy.nounA form of divination through the use of turtleshell plastrons.Definitions & examples from Wiktionary (CC BY-SA 3.0).