Home › Words › H › hairstreakhairstreakhairstreak means any of many butterflies, of the subfamily Theclinae, that have hairlike projections on the back wings.Among words judged in Lexicurio's Arena, hairstreak ranks #28,410 of 42,749 for Qualifying.EtymologyFrom hair + streak.nounAny of many butterflies, of the subfamily Theclinae, that have hairlike projections on the back wings.Definitions & examples from Wiktionary (CC BY-SA 3.0).