The maduvu (; Marathi: madhu, Hindi: singhauta), also known as a maru or madu, is a weapon from India. Most commonly called maru, it is also referred to as maan kombu after the deer horns from which it is made. The weapon typically consists of two blackbuck horns pointing in opposite directions connected by two crossbars which also act as a handle. Later variations were often tipped with steel and sometimes fitted with a plate of leather or steel to act as a shield. In the Panjab, the maru was typically constructed entirely of steel.
The maru originated among the Dravidians of south India and was favoured by the Bhil people. A similar weapon, consisting of a handle mounted on an antelope horn, was used as a crutch and served as a self-defence implement for the jogi who were forbidden by their order to carry conventional weaponry.