Home › Words › S › subserosasubserosasubserosa · noun — A layer of tissue between the muscularis and serosa.Definition from Wiktionary (CC BY-SA 3.0).Among words judged in Lexicurio's Arena, subserosa ranks #40,469 of 43,002 for Qualifying.EtymologyFrom sub- + serosa.nounA layer of tissue between the muscularis and serosa.Definitions & examples from Wiktionary (CC BY-SA 3.0).