The term 'Dry Biscuit' can refer to two different types of baked goods. The first is a RUSK, which is a type of biscuit that is twice-baked and has a hard, dry texture. It is usually made from flour, sugar, eggs, and butter, and is often served with tea or coffee. The second type of dry biscuit is a CRACKER, which is a thin, flat, and usually crisp baked food. Crackers are typically made from flour, water, and yeast, and are often eaten as a snack or with cheese or other toppings.