Added 9 October 2026 mantisfly noun noun ! Definition from Wiktionary (CC BY-SA). More about mantisfly at Wordnik → Where our words come from → Any species of insects in the family Mantispidae, which have heads and front legs looking like those of the praying mantis. Origin From mantis + fly. From Wiktionary, via Kaikki.org (CC BY-SA) Related Words: mantispidmantismantophasmidmantidflymantophasmatidmantidthespidsoothsayer Back to today's word