Home › Words › X › xeroprotectantxeroprotectantxeroprotectant · noun — A material that protects an organism from damage in very dry conditions.Definition from Wiktionary (CC BY-SA 3.0).EtymologyFrom xero- + protectant.nounA material that protects an organism from damage in very dry conditions.Definitions & examples from Wiktionary (CC BY-SA 3.0).