Home › Words › S › subplacentasubplacentasubplacenta means A structure on the maternal side of a placenta.Among words judged in Lexicurio's Arena, subplacenta ranks #16,749 of 42,762 for Qualifying.EtymologyFrom sub- + placenta.nounA structure on the maternal side of a placentaDefinitions & examples from Wiktionary (CC BY-SA 3.0).