线状无烟火药（Cordite，柯代火药）是一种19世纪晚期在英国发明的无烟火药，并用来取代火药作为枪砲的推进剂。线状无烟火药成份主要为硝化纤维素及稳定剂（有时也加入硝化甘油等其他成份）并压制成“面条”型。其拥有火药的一些传统特点：低爆炸性，低燃烧速度及低猛度。虽然对延长武器寿命有好处，不过由于其提供的能量不足以应付新式弹药的需求所以逐渐落伍并被淘汰。

线状无烟火药现在已不再生产。

炮弹的药筒/药包内也装有条形火药，不过这些火药往往是特殊的管状结构（单孔/多孔且横截面往往呈多边形，目的是达到理想的燃烧速度），且成份多为双基药或者其他较强的配方。与线状无烟火药差别很大，不要混淆。

Cordite is a family of smokeless propellants developed and produced in the United Kingdom since 1889 to replace gunpowder as a military propellant. Like gunpowder, cordite is classified as a low explosive because of its slow burning rates and consequently low brisance. These produce a subsonic deflagration wave rather than the supersonic detonation wave produced by brisants, or high explosives. The hot gases produced by burning gunpowder or cordite generate sufficient pressure to propel a bullet or shell to its target, but not so quickly as to routinely destroy the barrel of the gun.