Terminalia arjuna is a tree of the genus Terminalia. It is commonly known as arjuna or arjun tree in English,thella maddi in Telugu, kumbuk in Sinhala, and marudha maram in Tamil.

The arjuna is about 20–25 metres tall; usually has a buttressed trunk, and forms a wide canopy at the crown, from which branches drop downwards. It has oblong, conical leaves which are green on the top and brown below; smooth, grey bark; it has pale yellow flowers which appear between March and June; its glabrous, 2.5 to 5 cm fibrous woody fruit, divided into five wings, appears between September and November.

The arjuna is usually found growing on river banks or near dry river beds in Bangladesh, Uttar Pradesh, Madhya Pradesh, West Bengal and south and central India.It is known as matthimara in Kannada, neer maruthu in Malayalam ‘marutha maram’ (marutham pattai) in Tamil,thella maddi in Telugu and kohda in Rajasthan.

The arjuna is one of the species whose leaves are fed on by the Antheraea paphia moth which produces the tassar silk, a wild silk of commercial importance.