Home › Words › S › semiopacitysemiopacitysemiopacity means the quality of being semiopaque.Among words judged in Lexicurio's Arena, semiopacity ranks #16,749 of 42,762 for Qualifying.EtymologyFrom semi- + opacity.nounThe quality of being semiopaque.Definitions & examples from Wiktionary (CC BY-SA 3.0).