. . . "a small rocket engine on a larger rocket or spacecraft that is fired to slow or alter its course"@en-us . . "04084363-n"^^ . . "103930456"@en-us . "0"^^ . "0"^^ . . "retrorocket"@en-us . . . . "104084363"^^ . "retrorocket"^^ . . "103235539"@en-us .