A briquette is a hard block made by pressing dust together so it will burn. The dust is usually coal or charcoal. People put these blocks in a stove, a fireplace, or — this is the use you will actually meet — on a barbecue. The square charcoal pieces sold in a bag for 烤肉 are briquettes. English speakers say charcoal briquettes, or just briquettes, when they mean that bag. The word feels a bit technical if you are talking about coal for heating; around a grill it is ordinary. There is a verb to briquette, meaning to press stuff into these blocks, but you will almost never hear it in daily talk. The picture in the word is “a little brick of fuel.” It is not a building brick, and it is not food, though actually the name looks a little like biscuit if you are reading too fast.

炭磚；煤磚。台灣烤肉袋裝的方塊炭就是這個。