Wiktionary
carbon diselenide
n. (context inorganic compound English) The binary compound of carbon and selenium CSe2
Wikipedia
Carbon diselenide
Carbon diselenide is an inorganic compound with the chemical formula CSe. It is a yellow-orange oily liquid with pungent odor. It is an analogue of carbon disulfide (CS). This light-sensitive compound is insoluble in water and soluble in organic solvents.