noun
: a green crystalline nonvolatile compound UF 4 that is usually made from uranium dioxide and hydrogen fluoride above 500°C or from uranium metal and fluorine and that is used in making uranium hexafluoride
noun
: a green crystalline nonvolatile compound UF 4 that is usually made from uranium dioxide and hydrogen fluoride above 500°C or from uranium metal and fluorine and that is used in making uranium hexafluoride
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012