thionite

== English == === Etymology === From thio- (“containing sulphur”) +‎ -n- +‎ -ite. Coined by American author E. E. Smith in 1937. === Noun === thionite (uncountable) (science fiction) A fictional addictive drug said to induce euphoric dreams. === References === Jesse Sheidlower, editor (2001–2026), “thionite, n.”, in Historical Dictionary of Science Fiction.