Diploharpus

Diploharpus is an obscure and potentially fictitious term, primarily found in word game contexts or lists of unusual words. Its etymology is uncertain, but it is plausibly a combination of "diplo-" (meaning double or two, from Greek) and "harp", possibly referring to a theoretical double harp or an instrument somehow related to two harps.

Due to its lack of established usage or definition in musical instrument literature, etymological dictionaries, or other reliable sources, the exact meaning and potential historical existence of a diploharpus remain speculative. It is unlikely to be a term recognized within established musical or lexicographical fields. It may have been coined playfully or simply resulted from a typographical error that has since been repeated and disseminated.

The rarity of the term and absence of corroborating information suggest that diploharpus is best considered a curiosity or a word created for the purposes of linguistic novelty rather than a designation for an actual instrument. Further research may potentially reveal historical context or alternative interpretations, but presently, substantial evidence to support its existence as a real instrument is lacking.