燧石
近义词与同义词
按词义分组列出，使用时请结合具体语境。
a hard kind of stone; a form of silica more opaque than chalcedony
pebbles of flint used in masonry construction
a piece of flint that is struck to light a fire
a pure form of finely ground silica
variety of silica containing microcrystalline quartz