English Etymology Blend of solution + ion. Noun solion (plural solions) (electronics, historical) An electrochemical device of the 1950s, intended to replace the transistor in certain situations, and using ions rather than electrons to carry electrical charge. References “solion”, in Dictionary.com Unabridged, Dictionary.com, LLC, 1995–present. “solion”, in Merriam-Webster Online Dictionary, Springfield, Mass.: Merriam-Webster, 1996–present. “solion”, in OED Online , Oxford: Oxford University Press, launched 2000.Wikiwand - on Seamless Wikipedia browsing. On steroids.