Home › Words › R › rhinothecarhinothecarhinotheca · noun — the hornlike covering of the upper part of a bird's beak.Definition from Wiktionary (CC BY-SA 3.0).Among words judged in Lexicurio's Arena, rhinotheca ranks #11,142 of 43,201 for Qualifying.EtymologyFrom rhino- + theca.nounThe hornlike covering of the upper part of a bird's beak.Definitions & examples from Wiktionary (CC BY-SA 3.0).