ophioglossecommon nounSyllable DecompositionophioglosseEtymologyexpandDefinitions1. A plant of the genus Ophioglossum, a fern of the Ophioglossaceae family, with a small underground rhizome, whose frond consists of a cylindrical petiole bearing an entire vegetative blade and a simple, long-pedunculate fruiting spike, formed by two rows of sacs fused by their lower and upper surfaces.plantesexpand2. Common ophioglossum.in particularexpandPluralophioglossesTranslationsgerman:Natternzungeenglish:adder's tonguespanish:lengua de serpiente