- Department of Energy, Energy Department, Energy, DOE - the federal department responsible for maintaining a national energy policy of the United States; created in 1977
--1 is a kind of executive department
--1 has parts: Department of Energy Intelligence, DOEI - doe - mature female of mammals of which the male is called `buck'
--2 is a kind of placental, placental mammal, eutherian, eutherian mammal